diff --git a/docs/technical/webgl-context-lost-investigation.md b/docs/technical/webgl-context-lost-investigation.md
new file mode 100644
index 0000000..f6a2dd8
--- /dev/null
+++ b/docs/technical/webgl-context-lost-investigation.md
@@ -0,0 +1,367 @@
+# WebGL Context Lost - Investigation
+
+## Résumé court
+
+Le projet subit des pertes de contexte WebGL pendant les phases où le jeu active
+ou prépare le hand tracking, les interactions physiques ou le repair game.
+
+Le symptôme visible côté console est :
+
+```txt
+THREE.WebGLRenderer: Context Lost.
+[ERROR] [WebGL] Context lost - attempting auto-restore
+THREE.WebGLRenderer: Context Restored.
+```
+
+Le problème est bloquant parce que le hand tracking et le repair game sont au
+coeur de l'expérience. Quand le contexte WebGL saute, la scène Three.js peut se
+remonter, le joueur peut revenir au spawn, le pointer lock peut être perdu, et
+les tests de gameplay deviennent instables.
+
+## Ce qui fonctionne aujourd'hui
+
+La page principale monte un `<Canvas>` React Three Fiber dans
+`src/pages/page.tsx`.
+
+`src/world/World.tsx` compose ensuite :
+
+- la scène de jeu ou la scène de test physique ;
+- le player ;
+- les systèmes visuels de monde ;
+- les gants de hand tracking ;
+- les systèmes de debug.
+
+Le hand tracking est centralisé dans
+`src/providers/gameplay/HandTrackingProvider.tsx`.
+
+Il peut utiliser deux sources :
+
+- `browser` : MediaPipe JS dans le navigateur ;
+- `backend` : backend Python local via WebSocket.
+
+L'activation est déclenchée par :
+
+- certaines étapes du repair game ;
+- les zones d'interaction qui demandent explicitement les mains ;
+- la scène Physique en debug, selon les objets présents.
+
+## Problème observé
+
+Les context lost arrivent dans plusieurs situations :
+
+- entrée dans une zone d'interaction ;
+- lancement du hand tracking ;
+- lancement d'un repair game ;
+- scène Physique avec `TestMap`, `Physics`, `AnimatedModel`, waypoints GPS et
+  objets interactifs ;
+- source browser JS ;
+- source backend.
+
+Le fait que le crash existe avec les deux sources indique que le problème n'est
+probablement pas limité au backend Python ni à MediaPipe JS seul. Le hand
+tracking semble être un déclencheur fort, mais il arrive au moment où plusieurs
+ressources GPU et systèmes runtime se réveillent ensemble.
+
+## Pourquoi c'est bloquant
+
+Ce bug bloque la feature principale du projet :
+
+- le repair game dépend du hand tracking pour valider certaines actions ;
+- les interactions main sont nécessaires pour tester les objets grabbables ;
+- un context lost casse la continuité du gameplay ;
+- le joueur peut être replacé au spawn après reconstruction ;
+- le pointer lock peut être perdu ;
+- les logs deviennent difficiles à lire parce que le jeu tente de restaurer la
+  scène en boucle ;
+- le comportement n'est pas fiable pour une démo ou un déploiement.
+
+Tant que ce problème n'est pas stable, on ne peut pas valider correctement :
+
+- la mission e-bike ;
+- la mission pylône ;
+- la mission ferme ;
+- les interactions main ;
+- le switch browser/backend ;
+- le comportement en build de production.
+
+## Hypothèses principales
+
+### 1. Pression GPU au lancement du hand tracking
+
+MediaPipe browser peut créer ses propres ressources GPU. Si Three.js charge
+déjà beaucoup de géométries, textures, ombres et modèles, l'ajout du hand
+tracking peut faire passer le navigateur au-dessus d'une limite GPU.
+
+Le stash contient une tentative de mitigation en forçant MediaPipe browser et le
+backend à utiliser le CPU.
+
+### 2. Activation trop brusque du runtime mains
+
+Les logs montrent des transitions rapides :
+
+```txt
+Browser JS runtime starting
+Runtime source selected
+Runtime snapshot changed
+Browser JS runtime stopped
+Browser JS runtime starting
+```
+
+Ce type de start/stop rapide peut provoquer :
+
+- création webcam ;
+- création MediaPipe ;
+- montage des gants ;
+- update du state React ;
+- re-render du monde ;
+- stress GPU au même moment.
+
+### 3. Les gants 3D sont montés trop tôt
+
+Si les gants de hand tracking sont montés avant d'avoir de vraies mains
+détectées, le jeu charge et prépare des modèles GPU sans utilité immédiate.
+
+Le stash contient une tentative pour ne rendre les gants que lorsqu'une main
+existe réellement dans le snapshot.
+
+### 4. Re-upload textures / GLTF trop agressif
+
+`src/utils/three/optimizeGLTFScene.ts` modifie des textures GLTF. Si cette
+optimisation force trop souvent `needsUpdate`, mipmaps ou anisotropy, le
+navigateur peut recharger beaucoup de textures vers le GPU.
+
+Le stash limite cette pression en évitant de forcer les mipmaps et en abaissant
+l'anisotropy.
+
+### 5. Permission caméra au mauvais moment
+
+Demander la caméra au moment exact où le joueur entre dans une interaction ou
+lance le repair game ajoute un gros événement runtime au pire moment.
+
+Le stash contient une tentative de warmup caméra pour obtenir la permission plus
+tôt et réutiliser le stream au moment où le hand tracking devient nécessaire.
+
+### 6. La scène Physique ajoute du bruit
+
+La scène Physique est une scène de test volontairement riche :
+
+- `Physics` Rapier ;
+- `GrabbableObject` ;
+- `TriggerObject` ;
+- `RepairGame` ;
+- `AnimatedModel` ;
+- GPS preview ;
+- waypoints verts ;
+- player ;
+- debug overlay.
+
+Cette richesse est normale pour une scène de test, mais elle complique
+l'investigation parce qu'elle active beaucoup de systèmes à la fois.
+
+## Fichiers modifiés dans le stash
+
+Le stash `stash@{0}` contient 28 fichiers modifiés, environ `+530 / -152`.
+Il ne contient pas de fichiers untracked.
+
+| Fichier                                                   | Rôle dans l'investigation                                                                 |
+| --------------------------------------------------------- | ----------------------------------------------------------------------------------------- |
+| `README.md`                                               | Note sur les commandes backend depuis la racine du repo.                                  |
+| `backend/README.md`                                       | Documentation plus claire pour lancer le backend et réparer un `.venv` cassé.             |
+| `backend/hand_tracker.py`                                 | Force le backend MediaPipe en CPU.                                                        |
+| `docs/user/main-feature.md`                               | Ajustements de documentation utilisateur.                                                 |
+| `public/sounds/dialogue/subtitles/fr/electricienne.srt`   | Ajustements de sous-titres, pas central pour le context lost.                             |
+| `public/sounds/dialogue/subtitles/fr/narrateur.srt`       | Ajustements de sous-titres, pas central pour le context lost.                             |
+| `src/components/debug/DebugPlayerModel.tsx`               | Ajustements de modèle debug player.                                                       |
+| `src/components/three/handTracking/HandTrackingGlove.tsx` | Retire le preload automatique des gants pour réduire la pression GPU.                     |
+| `src/components/three/interaction/GrabbableObject.tsx`    | Marque les grabbables qui nécessitent vraiment le hand tracking.                          |
+| `src/components/three/interaction/InteractableObject.tsx` | Ajoute le flag `handTracking` aux interactables.                                          |
+| `src/data/debug/testSceneConfig.ts`                       | Stabilise la scène Physique : sol, GPS, hauteur des waypoints.                            |
+| `src/data/handTrackingConfig.ts`                          | Ajoute délai d'activation, TTL warmup caméra, delegate CPU browser.                       |
+| `src/data/player/playerConfig.ts`                         | Corrige le spawn Physique avec `PLAYER_EYE_HEIGHT`.                                       |
+| `src/hooks/debug/useSceneMode.ts`                         | Force `game` hors debug actif pour éviter des scènes debug en prod.                       |
+| `src/hooks/handTracking/useBothFistsHold.ts`              | Sort le hold des deux poings de `useFrame` R3F vers `requestAnimationFrame`.              |
+| `src/hooks/handTracking/useBrowserHandTracking.ts`        | Encadre `detectForVideo`, release MediaPipe en cleanup, gère les erreurs.                 |
+| `src/hooks/three/useTerrainHeight.ts`                     | Ajustements terrain, liés au snap/player.                                                 |
+| `src/lib/handTracking/browserHandTracking.ts`             | Force delegate CPU, garde une instance MediaPipe, ajoute `releaseBrowserHandLandmarker`.  |
+| `src/lib/handTracking/handTrackingSession.ts`             | Ajoute warmup caméra, cache stream, timeout et consommation du stream préparé.            |
+| `src/managers/InteractionManager.ts`                      | Ajoute `handTrackingNearby` pour ne pas activer les mains sur toute interaction.          |
+| `src/pages/page.tsx`                                      | Gestion WebGL context lost/restored, DPR fixe, antialias off, release MediaPipe au crash. |
+| `src/providers/gameplay/HandTrackingProvider.tsx`         | Ajoute activation différée, snapshot queued, warmup runtime.                              |
+| `src/types/interaction/interaction.ts`                    | Ajoute `handTracking` et `handTrackingNearby` aux types interaction.                      |
+| `src/utils/debug/Debug.ts`                                | Synchronise l'affichage du controller hand tracking source.                               |
+| `src/utils/three/optimizeGLTFScene.ts`                    | Réduit la pression GPU des textures GLTF.                                                 |
+| `src/world/World.tsx`                                     | Ne rend les gants que si une main correspondante est détectée.                            |
+| `src/world/debug/TestMap.tsx`                             | Nettoie les logs, stabilise waypoints/GPS/scène Physique.                                 |
+| `src/world/player/PlayerCamera.tsx`                       | Ajustements pointer lock/canvas ciblé.                                                    |
+
+## Fichiers actuellement modifiés dans le worktree
+
+Etat observé au moment de cette note :
+
+| Fichier                                                   | Statut                                                    |
+| --------------------------------------------------------- | --------------------------------------------------------- |
+| `public/models/talkie/*`                                  | Beaucoup d'anciennes textures/fichiers `.gltf` supprimés. |
+| `public/models/talkie/model.glb`                          | Nouveau fichier non suivi.                                |
+| `src/components/three/handTracking/HandTrackingGlove.tsx` | Modifié.                                                  |
+| `src/data/debug/testSceneConfig.ts`                       | Modifié.                                                  |
+| `src/data/gameplay/repairMissions.ts`                     | Modifié.                                                  |
+| `src/data/handTrackingConfig.ts`                          | Modifié.                                                  |
+| `src/data/player/playerConfig.ts`                         | Modifié.                                                  |
+| `src/data/world/mapLodConfig.ts`                          | Modifié.                                                  |
+| `src/hooks/handTracking/useBrowserHandTracking.ts`        | Modifié.                                                  |
+| `src/hooks/handTracking/useRemoteHandTracking.ts`         | Modifié.                                                  |
+| `src/lib/handTracking/browserHandTracking.ts`             | Modifié.                                                  |
+| `src/lib/handTracking/handTrackingSession.ts`             | Modifié.                                                  |
+| `src/pages/page.tsx`                                      | Modifié.                                                  |
+| `src/providers/gameplay/HandTrackingProvider.tsx`         | Modifié.                                                  |
+| `src/utils/debug/Debug.ts`                                | Modifié.                                                  |
+| `src/utils/three/optimizeGLTFScene.ts`                    | Modifié.                                                  |
+| `src/world/World.tsx`                                     | Modifié.                                                  |
+| `src/world/debug/TestMap.tsx`                             | Modifié.                                                  |
+| `src/world/player/Player.tsx`                             | Modifié.                                                  |
+| `src/world/player/PlayerCamera.tsx`                       | Modifié.                                                  |
+| `src/world/player/PlayerController.tsx`                   | Modifié.                                                  |
+| `src/components/ui/RuntimeLoadingIndicator.tsx`           | Nouveau fichier non suivi.                                |
+| `src/hooks/handTracking/useHandTrackingRuntimeWarmup.ts`  | Nouveau fichier non suivi.                                |
+| `src/world/player/playerRuntimeSnapshot.ts`               | Nouveau fichier non suivi.                                |
+
+Attention : les fichiers supprimés/nouveaux du talkie semblent être un sujet
+séparé du context lost. Il faut les garder séparés dans les commits.
+
+## Fichiers directement impactés par le bug
+
+### Canvas et WebGL
+
+- `src/pages/page.tsx`
+- `src/world/World.tsx`
+- `src/utils/three/optimizeGLTFScene.ts`
+
+Ces fichiers influencent directement la charge GPU, la configuration du canvas,
+les ressources GLTF et le comportement au context lost/restored.
+
+### Hand tracking
+
+- `src/providers/gameplay/HandTrackingProvider.tsx`
+- `src/hooks/handTracking/useBrowserHandTracking.ts`
+- `src/hooks/handTracking/useRemoteHandTracking.ts`
+- `src/hooks/handTracking/useBothFistsHold.ts`
+- `src/hooks/handTracking/useHandTrackingRuntimeWarmup.ts`
+- `src/lib/handTracking/browserHandTracking.ts`
+- `src/lib/handTracking/handTrackingSession.ts`
+- `src/data/handTrackingConfig.ts`
+- `src/components/three/handTracking/HandTrackingGlove.tsx`
+- `backend/hand_tracker.py`
+
+Ces fichiers contrôlent le déclenchement, la source, la caméra, MediaPipe, le
+backend et le rendu visuel des mains.
+
+### Interactions et repair game
+
+- `src/components/three/interaction/GrabbableObject.tsx`
+- `src/components/three/interaction/InteractableObject.tsx`
+- `src/managers/InteractionManager.ts`
+- `src/types/interaction/interaction.ts`
+- `src/components/three/gameplay/RepairGame.tsx`
+- `src/hooks/gameplay/useRepairMissionStep.ts`
+- `src/hooks/gameplay/useRepairMovementLocked.ts`
+
+Ces fichiers sont impactés parce que l'entrée dans une zone ou une étape repair
+peut déclencher le hand tracking.
+
+### Player et restauration après crash
+
+- `src/world/player/Player.tsx`
+- `src/world/player/PlayerCamera.tsx`
+- `src/world/player/PlayerController.tsx`
+- `src/world/player/playerRuntimeSnapshot.ts`
+- `src/data/player/playerConfig.ts`
+
+Ces fichiers influencent le spawn, la caméra, le pointer lock, et la possibilité
+de récupérer la dernière position après un context lost.
+
+### Scène Physique / debug
+
+- `src/world/debug/TestMap.tsx`
+- `src/data/debug/testSceneConfig.ts`
+- `src/components/debug/DebugPlayerModel.tsx`
+- `src/hooks/debug/useSceneMode.ts`
+- `src/utils/debug/Debug.ts`
+
+Ces fichiers ne sont pas forcément la cause racine, mais ils créent une scène de
+stress utile pour reproduire le bug.
+
+## Ce que le stash essayait de corriger
+
+Le stash essaye de réduire le risque de context lost avec plusieurs leviers :
+
+1. passer MediaPipe browser/backend en CPU ;
+2. libérer MediaPipe quand le runtime s'arrête ou quand WebGL saute ;
+3. éviter de monter les gants sans mains détectées ;
+4. retarder l'activation du hand tracking pour éviter les start/stop violents ;
+5. demander la caméra plus tôt et réutiliser le stream ;
+6. réduire la charge GPU du canvas avec DPR fixe et antialias off ;
+7. limiter les re-uploads de textures GLTF ;
+8. distinguer les interactions qui demandent vraiment le hand tracking ;
+9. restaurer WebGL avec une limite pour éviter les boucles infinies ;
+10. conserver la position du joueur après restauration.
+
+## Ce qui reste à prouver
+
+Il faut encore isoler le déclencheur exact :
+
+- crash avec hand tracking désactivé complètement ;
+- crash avec source browser JS seulement ;
+- crash avec source backend seulement ;
+- crash avec gants 3D désactivés ;
+- crash avec MediaPipe CPU ;
+- crash avec `AnimatedModel` de TestMap désactivé ;
+- crash avec GPS preview/waypoints désactivés ;
+- crash avec shadows/antialias/DPR réduits ;
+- crash en scène game réelle, pas seulement scène Physique.
+
+## Plan d'investigation recommandé
+
+1. Stabiliser le worktree et ne pas mélanger assets talkie, LOD, docs backend et
+   context lost dans le même commit.
+2. Garder le stash tant que le fix final n'est pas validé.
+3. Créer un commit ou patch isolé pour les logs context lost seulement.
+4. Ajouter un switch debug qui permet de couper séparément :
+   - hand tracking runtime ;
+   - gants 3D ;
+   - MediaPipe browser ;
+   - backend ;
+   - GPS preview ;
+   - AnimatedModel de TestMap.
+5. Reproduire le bug avec une matrice claire.
+6. Garder les changements qui diminuent réellement les context lost.
+7. Supprimer les logs temporaires une fois le diagnostic terminé.
+
+## Recommandation Git
+
+Ne pas supprimer le stash maintenant.
+
+Il contient du travail réel sur le context lost. Même s'il n'est pas parfait, il
+sert de trace d'investigation et contient des morceaux utiles.
+
+Avant de le supprimer, sauvegarder le patch :
+
+```bash
+git stash show -p stash@{0} > context-lost-stash.patch
+```
+
+Ensuite seulement, si tout a été repris dans des commits propres :
+
+```bash
+git stash drop stash@{0}
+```
+
+## Commits logiques proposés
+
+Séparer en plusieurs commits pour éviter un gros commit illisible :
+
+1. `docs: document webgl context lost investigation`
+2. `fix: reduce handtracking gpu pressure`
+3. `fix: delay handtracking activation`
+4. `fix: preserve player state after webgl restore`
+5. `fix: stabilize physics debug scene`
+6. `docs: clarify backend handtracking setup`
diff --git a/public/assets/world/UI/pylon-mission-notification.webm b/public/assets/world/UI/centrale.webm
similarity index 100%
rename from public/assets/world/UI/pylon-mission-notification.webm
rename to public/assets/world/UI/centrale.webm
diff --git a/public/assets/world/UI/ebike-mission-notification.webm b/public/assets/world/UI/ebike.webm
similarity index 100%
rename from public/assets/world/UI/ebike-mission-notification.webm
rename to public/assets/world/UI/ebike.webm
diff --git a/public/assets/world/UI/farm-mission-notification.webm b/public/assets/world/UI/laferme.webm
similarity index 100%
rename from public/assets/world/UI/farm-mission-notification.webm
rename to public/assets/world/UI/laferme.webm
diff --git a/public/models/arbre-LOD/model.glb b/public/models/arbre-LOD/model.glb
new file mode 100644
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index 53b91f2..4b94915 100644
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diff --git a/public/models/electricienne-animated/model.gltf b/public/models/electricienne-animated/model.gltf
index 790a4a0..3586956 100644
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index e72d715..5bbcebd 100644
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index e72d715..5bbcebd 100644
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new file mode 100644
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deleted file mode 100644
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+++ /dev/null
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deleted file mode 100644
index 713980d..0000000
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deleted file mode 100644
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deleted file mode 100644
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-size 63007
diff --git a/public/models/talkie/prise_Base_color.png b/public/models/talkie/prise_Base_color.png
deleted file mode 100644
index 30d846f..0000000
--- a/public/models/talkie/prise_Base_color.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7e012c8775c6eb274a80856394fac6673f7beb754c2f78e1c51c842ac017fdd5
-size 472487
diff --git a/public/models/talkie/prise_Height.png b/public/models/talkie/prise_Height.png
deleted file mode 100644
index 713980d..0000000
--- a/public/models/talkie/prise_Height.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:208daeea7306a6a576fbe1098c66d59571dd984635d7fb6c017fd767cde531ed
-size 3178
diff --git a/public/models/talkie/prise_Metallic.png b/public/models/talkie/prise_Metallic.png
deleted file mode 100644
index b46e54a..0000000
--- a/public/models/talkie/prise_Metallic.png
+++ /dev/null
@@ -1,3 +0,0 @@
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-size 1118
diff --git a/public/models/talkie/prise_Mixed_AO.png b/public/models/talkie/prise_Mixed_AO.png
deleted file mode 100644
index 1ed1f71..0000000
--- a/public/models/talkie/prise_Mixed_AO.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9a7ae156409544d00bf3332fb542aaec0711d4ce4c9d39d4bd573fb4f0212051
-size 230780
diff --git a/public/models/talkie/prise_Normal.png b/public/models/talkie/prise_Normal.png
deleted file mode 100644
index 5bcffa1..0000000
--- a/public/models/talkie/prise_Normal.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3c00bec06b1bbd954eb91872fa8cd817f247b275c16e6c372db52189ba6f3778
-size 212856
diff --git a/public/models/talkie/prise_Normal_OpenGL.png b/public/models/talkie/prise_Normal_OpenGL.png
deleted file mode 100644
index 6bc3741..0000000
--- a/public/models/talkie/prise_Normal_OpenGL.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:aa8e8d378a595f8aafc4cd34ecac65426a03847a402f955b7b0280f0383d40eb
-size 224961
diff --git a/public/models/talkie/prise_Roughness.png b/public/models/talkie/prise_Roughness.png
deleted file mode 100644
index c827dba..0000000
--- a/public/models/talkie/prise_Roughness.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:161c97c6ad56619ad702cc955a26ea92203575f31bb35ebc8ca398b48aae9889
-size 100073
diff --git a/public/models/talkie/talkie_Base_color.png b/public/models/talkie/talkie_Base_color.png
deleted file mode 100644
index 295b322..0000000
--- a/public/models/talkie/talkie_Base_color.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:aead25dde6c940f353fa4a53f43e37dde80cd924ccced3c4f88a45dcc5fb4751
-size 610827
diff --git a/public/models/talkie/talkie_Height.png b/public/models/talkie/talkie_Height.png
deleted file mode 100644
index 713980d..0000000
--- a/public/models/talkie/talkie_Height.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:208daeea7306a6a576fbe1098c66d59571dd984635d7fb6c017fd767cde531ed
-size 3178
diff --git a/public/models/talkie/talkie_Metallic.png b/public/models/talkie/talkie_Metallic.png
deleted file mode 100644
index b46e54a..0000000
--- a/public/models/talkie/talkie_Metallic.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:60041773ef2d493f3547aa1b0fbdf5b1bb548a3da39164384293ef5292b2c5b3
-size 1118
diff --git a/public/models/talkie/talkie_Mixed_AO.png b/public/models/talkie/talkie_Mixed_AO.png
deleted file mode 100644
index a015f96..0000000
--- a/public/models/talkie/talkie_Mixed_AO.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:78a4e5bc8affb8c7f529712ddcc4958982729d4bbc64163d93b4e3df8192f3e9
-size 229809
diff --git a/public/models/talkie/talkie_Normal.png b/public/models/talkie/talkie_Normal.png
deleted file mode 100644
index d3e9649..0000000
--- a/public/models/talkie/talkie_Normal.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3fba8c5bce232fd16f3d3da18228438443bfcfab6f1673884e2c6439a799a342
-size 285066
diff --git a/public/models/talkie/talkie_Normal_OpenGL.png b/public/models/talkie/talkie_Normal_OpenGL.png
deleted file mode 100644
index e58b36f..0000000
--- a/public/models/talkie/talkie_Normal_OpenGL.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:708382f0b0340e845f0cd4127b84ec5f837f5ca3a51f0c4064ba790374643c21
-size 287356
diff --git a/public/models/talkie/talkie_Roughness.png b/public/models/talkie/talkie_Roughness.png
deleted file mode 100644
index 091f911..0000000
--- a/public/models/talkie/talkie_Roughness.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:638da789f9d21dfa546cf053c5f0c4e47fc18eef3d7ac412d39bdbdf3b3974b1
-size 134252
diff --git a/public/models/talkie/touches_Base_color.png b/public/models/talkie/touches_Base_color.png
deleted file mode 100644
index eb7631c..0000000
--- a/public/models/talkie/touches_Base_color.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:47ef413967a461f9768b74d15a2ab1c8e3e3fe6fc9be027d8cf1e7268bb8a888
-size 126096
diff --git a/public/models/talkie/touches_Height.png b/public/models/talkie/touches_Height.png
deleted file mode 100644
index 713980d..0000000
--- a/public/models/talkie/touches_Height.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:208daeea7306a6a576fbe1098c66d59571dd984635d7fb6c017fd767cde531ed
-size 3178
diff --git a/public/models/talkie/touches_Metallic.png b/public/models/talkie/touches_Metallic.png
deleted file mode 100644
index b46e54a..0000000
--- a/public/models/talkie/touches_Metallic.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
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-size 1118
diff --git a/public/models/talkie/touches_Mixed_AO.png b/public/models/talkie/touches_Mixed_AO.png
deleted file mode 100644
index 5673800..0000000
--- a/public/models/talkie/touches_Mixed_AO.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:6884417f47afb4330b00f9f42fa1faf7b8bbd06d2ae9595cffe409a4d38cd461
-size 246760
diff --git a/public/models/talkie/touches_Normal.png b/public/models/talkie/touches_Normal.png
deleted file mode 100644
index 07f83c4..0000000
--- a/public/models/talkie/touches_Normal.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:09d922e17cd400c32ef51462723e9c5ee9dfbe4c668e88e6057f9e7d60c8830e
-size 59216
diff --git a/public/models/talkie/touches_Normal_OpenGL.png b/public/models/talkie/touches_Normal_OpenGL.png
deleted file mode 100644
index ec98ce7..0000000
--- a/public/models/talkie/touches_Normal_OpenGL.png
+++ /dev/null
@@ -1,3 +0,0 @@
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-size 59178
diff --git a/public/models/talkie/touches_Roughness.png b/public/models/talkie/touches_Roughness.png
deleted file mode 100644
index bd73a19..0000000
--- a/public/models/talkie/touches_Roughness.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5804a17a4fd8691a606cbb3e671234f2c876dfc0e88e16d2f781bd35785167cb
-size 56002
diff --git a/public/models/talkie/écran_Base_color.png b/public/models/talkie/écran_Base_color.png
deleted file mode 100644
index b28a367..0000000
--- a/public/models/talkie/écran_Base_color.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bfbf65890f6d5019bf113246dcecb83c97e31d6e10b0429d5e89df9df67a58bd
-size 6498
diff --git a/public/models/talkie/écran_Height.png b/public/models/talkie/écran_Height.png
deleted file mode 100644
index 713980d..0000000
--- a/public/models/talkie/écran_Height.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:208daeea7306a6a576fbe1098c66d59571dd984635d7fb6c017fd767cde531ed
-size 3178
diff --git a/public/models/talkie/écran_Metallic.png b/public/models/talkie/écran_Metallic.png
deleted file mode 100644
index b46e54a..0000000
--- a/public/models/talkie/écran_Metallic.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:60041773ef2d493f3547aa1b0fbdf5b1bb548a3da39164384293ef5292b2c5b3
-size 1118
diff --git a/public/models/talkie/écran_Mixed_AO.png b/public/models/talkie/écran_Mixed_AO.png
deleted file mode 100644
index e91eb6e..0000000
--- a/public/models/talkie/écran_Mixed_AO.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d4f3fd92f328f0733f9cb9865209466c251f4edf4750654eb0385b519300cf34
-size 329712
diff --git a/public/models/talkie/écran_Normal.png b/public/models/talkie/écran_Normal.png
deleted file mode 100644
index 175152b..0000000
--- a/public/models/talkie/écran_Normal.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a07dd2bf8fe1d37b9a74d2ca09b8a77d8a97029d41a8483e34ba30bd8e9efc04
-size 74315
diff --git a/public/models/talkie/écran_Normal_OpenGL.png b/public/models/talkie/écran_Normal_OpenGL.png
deleted file mode 100644
index e17d9b3..0000000
--- a/public/models/talkie/écran_Normal_OpenGL.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ca90a32ea8b1dadb11a5cf2e41d4d096920fd7a2ab493dec96682a479d4e7a8c
-size 74316
diff --git a/public/models/talkie/écran_Roughness.png b/public/models/talkie/écran_Roughness.png
deleted file mode 100644
index d89bffa..0000000
--- a/public/models/talkie/écran_Roughness.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d560c80d755fdfff917c63d96d664cc4c9be963cc38ac63533418f7df1b0642c
-size 72772
diff --git a/src/components/three/handTracking/HandTrackingGlove.tsx b/src/components/three/handTracking/HandTrackingGlove.tsx
index 37e4518..d5c8904 100644
--- a/src/components/three/handTracking/HandTrackingGlove.tsx
+++ b/src/components/three/handTracking/HandTrackingGlove.tsx
@@ -1,7 +1,6 @@
 import type { ReactNode } from "react";
 import { Component, useEffect, useMemo, useRef } from "react";
 import { useFrame, useThree } from "@react-three/fiber";
-import { useGLTF } from "@react-three/drei";
 import * as THREE from "three";
 import { SkeletonUtils } from "three-stdlib";
 import { useHandTrackingSnapshot } from "@/hooks/handTracking/useHandTrackingSnapshot";
@@ -362,6 +361,3 @@ export function HandTrackingGlove({
     </HandTrackingGloveErrorBoundary>
   );
 }
-
-useGLTF.preload(GLOVE_CONFIGS.left.modelPath);
-useGLTF.preload(GLOVE_CONFIGS.right.modelPath);
diff --git a/src/components/ui/GameSettingsMenu.tsx b/src/components/ui/GameSettingsMenu.tsx
index abd52ce..f30c6f0 100644
--- a/src/components/ui/GameSettingsMenu.tsx
+++ b/src/components/ui/GameSettingsMenu.tsx
@@ -105,6 +105,9 @@ function GraphicsPresetButton({
   const lodLabel = config.forceLodModels
     ? "LOD forcé"
     : `HD ${config.lodHighDetailDistance}m`;
+  const chunkLabel = config.chunkStreamingEnabled
+    ? formatChunkDistance(config.chunkLoadRadius)
+    : "All";
 
   return (
     <button
@@ -115,8 +118,7 @@ function GraphicsPresetButton({
     >
       <span>{config.label}</span>
       <small>
-        {formatChunkDistance(config.chunkLoadRadius)} · {lodLabel} ·{" "}
-        {config.fogEnabled ? "Fog" : "Clear"}
+        {chunkLabel} · {lodLabel} · {config.fogEnabled ? "Fog" : "Clear"}
       </small>
     </button>
   );
diff --git a/src/components/ui/talkie/TalkieModel.tsx b/src/components/ui/talkie/TalkieModel.tsx
index 050833b..c0ec8ba 100644
--- a/src/components/ui/talkie/TalkieModel.tsx
+++ b/src/components/ui/talkie/TalkieModel.tsx
@@ -5,7 +5,7 @@ import * as THREE from "three";
 import gsap from "gsap";
 import type { Vector3Tuple } from "@/types/three/three";
 
-const TALKIE_MODEL_PATH = "/models/talkie/model.gltf";
+const TALKIE_MODEL_PATH = "/models/talkie/model.glb";
 const TALKIE_REST_Y = -1.55;
 const TALKIE_ACTIVE_Y = -0.38;
 const TALKIE_BASE_ROTATION: Vector3Tuple = [0.08, -0.52, -0.04];
diff --git a/src/data/debug/testSceneConfig.ts b/src/data/debug/testSceneConfig.ts
index 2d7f49b..617fb3c 100644
--- a/src/data/debug/testSceneConfig.ts
+++ b/src/data/debug/testSceneConfig.ts
@@ -1,13 +1,15 @@
 import type { Vector3Tuple } from "@/types/three/three";
 import type { RepairMissionId } from "@/types/gameplay/repairMission";
 
+const DEG_TO_RAD = Math.PI / 180;
+
 export const TEST_SCENE_FLOOR_POSITION: Vector3Tuple = [0, -0.5, 0];
 export const TEST_SCENE_FLOOR_SIZE: Vector3Tuple = [200, 1, 200];
 export const TEST_SCENE_FLOOR_COLLIDER_HALF_EXTENTS: Vector3Tuple = [
   100, 0.5, 100,
 ];
 
-export const TEST_SCENE_GRABBABLE_POSITION: Vector3Tuple = [0, 1, -3];
+export const TEST_SCENE_GRABBABLE_POSITION: Vector3Tuple = [0, 0.25, -3];
 export const TEST_SCENE_GRABBABLE_BOX_SIZE: Vector3Tuple = [0.5, 0.5, 0.5];
 export const TEST_SCENE_GRABBABLE_COLOR = "#e07b39";
 export const TEST_SCENE_GRABBABLE_ROUGHNESS = 0.6;
@@ -23,6 +25,12 @@ export const TEST_SCENE_TRIGGER_METALNESS = 0.5;
 
 export const TEST_SCENE_REPAIR_ZONE_MARKER_RADIUS = 1.65;
 export const TEST_SCENE_REPAIR_ZONE_MARKER_TUBE_RADIUS = 0.045;
+export const TEST_SCENE_GPS_PREVIEW_POSITION: Vector3Tuple = [0, 5, -4.8];
+export const TEST_SCENE_GPS_PREVIEW_ROTATION: Vector3Tuple = [
+  -33 * DEG_TO_RAD,
+  0,
+  0,
+];
 
 export const GAME_REPAIR_ZONES = [
   {
diff --git a/src/data/galleryModels.ts b/src/data/galleryModels.ts
index 8ac0c36..3b38774 100644
--- a/src/data/galleryModels.ts
+++ b/src/data/galleryModels.ts
@@ -143,7 +143,7 @@ export const galleryModels: GalleryModel[] = [
   },
   { id: "sapin", name: "Sapin", path: "/models/sapin/model.gltf" },
   { id: "skybox", name: "Skybox", path: "/models/skybox/skybox.gltf" },
-  { id: "talkie", name: "Talkie", path: "/models/talkie/model.gltf" },
+  { id: "talkie", name: "Talkie", path: "/models/talkie/model.glb" },
   { id: "terrain", name: "Terrain", path: "/models/terrain/model.gltf" },
   {
     id: "tuyauxlac",
diff --git a/src/data/gameplay/repairMissions.ts b/src/data/gameplay/repairMissions.ts
index 7f5f8ea..fb676db 100644
--- a/src/data/gameplay/repairMissions.ts
+++ b/src/data/gameplay/repairMissions.ts
@@ -41,11 +41,6 @@ export const REPAIR_MISSIONS: Record<RepairMissionId, RepairMissionConfig> = {
         label: "Replacement cooling core",
         modelPath: "/models/refroidisseur/model.gltf",
       },
-      {
-        id: "ebike-radio-distractor",
-        label: "Radio module",
-        modelPath: "/models/talkie/model.gltf",
-      },
       {
         id: "ebike-glove-distractor",
         label: "Insulation glove",
@@ -134,11 +129,6 @@ export const REPAIR_MISSIONS: Record<RepairMissionId, RepairMissionConfig> = {
         label: "Tree sensor",
         modelPath: "/models/sapin/model.gltf",
       },
-      {
-        id: "farm-radio-distractor",
-        label: "Radio module",
-        modelPath: "/models/talkie/model.gltf",
-      },
     ],
   },
 };
diff --git a/src/data/handTrackingConfig.ts b/src/data/handTrackingConfig.ts
index 0b8c773..2b28dda 100644
--- a/src/data/handTrackingConfig.ts
+++ b/src/data/handTrackingConfig.ts
@@ -8,3 +8,9 @@ export const HAND_TRACKING_BROWSER_WASM_URL =
   "https://cdn.jsdelivr.net/npm/@mediapipe/tasks-vision@0.10.35/wasm";
 export const HAND_TRACKING_BROWSER_MODEL_URL =
   "https://storage.googleapis.com/mediapipe-models/hand_landmarker/hand_landmarker/float16/1/hand_landmarker.task";
+export const HAND_TRACKING_BROWSER_DELEGATE: "CPU" | "GPU" = "CPU";
+
+// Delay before the runtime actually starts after `enabled` flips to true.
+// Absorbs React StrictMode's mount/unmount/mount cycle in dev and rapid
+// `nearby` toggles at trigger borders. Invisible to the user (~5 frames).
+export const HAND_TRACKING_RUNTIME_START_DELAY_MS = 80;
diff --git a/src/data/player/playerConfig.ts b/src/data/player/playerConfig.ts
index 700d6d5..f2c556d 100644
--- a/src/data/player/playerConfig.ts
+++ b/src/data/player/playerConfig.ts
@@ -20,4 +20,8 @@ export const PLAYER_SPAWN_POSITION_GAME: Vector3Tuple = [
   LA_FABRIK_PLAYER_SPAWN[1],
   LA_FABRIK_PLAYER_SPAWN[2] - 1,
 ];
-export const PLAYER_SPAWN_POSITION_PHYSICS: Vector3Tuple = [0, 3, 0];
+export const PLAYER_SPAWN_POSITION_PHYSICS: Vector3Tuple = [
+  0,
+  PLAYER_EYE_HEIGHT,
+  0,
+];
diff --git a/src/data/world/graphicsConfig.ts b/src/data/world/graphicsConfig.ts
index be5b1e9..43dbd19 100644
--- a/src/data/world/graphicsConfig.ts
+++ b/src/data/world/graphicsConfig.ts
@@ -1,9 +1,16 @@
-export const GRAPHICS_PRESET_KEYS = ["low", "medium", "high", "ultra"] as const;
+export const GRAPHICS_PRESET_KEYS = [
+  "low",
+  "medium",
+  "high",
+  "ultra",
+  "max",
+] as const;
 
 export type GraphicsPreset = (typeof GRAPHICS_PRESET_KEYS)[number];
 
 export interface GraphicsPresetConfig {
   chunkLoadRadius: number;
+  chunkStreamingEnabled: boolean;
   chunkUnloadRadius: number;
   fogEnabled: boolean;
   forceLodModels: boolean;
@@ -16,6 +23,7 @@ export const GRAPHICS_PRESETS = {
     label: "Basse",
     chunkLoadRadius: 10,
     chunkUnloadRadius: 18,
+    chunkStreamingEnabled: true,
     fogEnabled: true,
     forceLodModels: true,
     lodHighDetailDistance: 0,
@@ -24,25 +32,37 @@ export const GRAPHICS_PRESETS = {
     label: "Moyenne",
     chunkLoadRadius: 20,
     chunkUnloadRadius: 30,
+    chunkStreamingEnabled: true,
     fogEnabled: true,
     forceLodModels: true,
     lodHighDetailDistance: 0,
   },
   high: {
     label: "High",
-    chunkLoadRadius: 35,
-    chunkUnloadRadius: 45,
+    chunkLoadRadius: 30,
+    chunkUnloadRadius: 40,
+    chunkStreamingEnabled: true,
     fogEnabled: false,
     forceLodModels: false,
-    lodHighDetailDistance: 10,
+    lodHighDetailDistance: 20,
   },
   ultra: {
     label: "Ultra",
     chunkLoadRadius: 50,
     chunkUnloadRadius: 65,
+    chunkStreamingEnabled: true,
     fogEnabled: false,
     forceLodModels: false,
-    lodHighDetailDistance: 20,
+    lodHighDetailDistance: 30,
+  },
+  max: {
+    label: "Max",
+    chunkLoadRadius: 50,
+    chunkUnloadRadius: 65,
+    chunkStreamingEnabled: false,
+    fogEnabled: false,
+    forceLodModels: false,
+    lodHighDetailDistance: 50,
   },
 } as const satisfies Record<GraphicsPreset, GraphicsPresetConfig>;
 
diff --git a/src/data/world/lightingConfig.ts b/src/data/world/lightingConfig.ts
index bf91955..58a3d00 100644
--- a/src/data/world/lightingConfig.ts
+++ b/src/data/world/lightingConfig.ts
@@ -3,9 +3,9 @@ const SUN_LIGHT_COLOR = "#ffe2bf";
 
 export const LIGHTING_DEFAULTS = {
   ambientColor: AMBIENT_LIGHT_COLOR,
-  ambientIntensity: 0.9,
+  ambientIntensity: 0.7,
   sunColor: SUN_LIGHT_COLOR,
-  sunIntensity: 2.2,
+  sunIntensity: 1.9,
   sunX: 70,
   sunY: 45,
   sunZ: 35,
diff --git a/src/data/world/mapLodConfig.ts b/src/data/world/mapLodConfig.ts
index 2bea581..91ff213 100644
--- a/src/data/world/mapLodConfig.ts
+++ b/src/data/world/mapLodConfig.ts
@@ -13,7 +13,9 @@ export const MAP_LOD_MODEL_PATHS = {
   lafabrik: "/models/lafabrik-LOD/model.gltf",
   maison1: "/models/maison1-LOD/model.gltf",
   panneauaffichage: "/models/panneauaffichage-LOD/model.gltf",
-  talkie: "/models/talkie-LOD/model.gltf",
+  arbre: "/models/arbre-LOD/model.glb",
+  buisson: "/models/buisson-LOD/model.glb",
+  sapin: "/models/sapin-LOD/model.glb",
 } as const satisfies Record<string, string>;
 
 export function getMapLodModelPath(modelName: string): string | null {
@@ -22,6 +24,19 @@ export function getMapLodModelPath(modelName: string): string | null {
   );
 }
 
+export const MAP_LOD_SCALE_MULTIPLIERS = {
+  sapin: 0.35,
+  buisson: 0.7,
+} as const satisfies Partial<Record<keyof typeof MAP_LOD_MODEL_PATHS, number>>;
+
+export function getMapLodScaleMultiplier(modelName: string): number {
+  return (
+    MAP_LOD_SCALE_MULTIPLIERS[
+      modelName as keyof typeof MAP_LOD_SCALE_MULTIPLIERS
+    ] ?? 1
+  );
+}
+
 export function selectMapModelPathByDistance({
   distance,
   modelName,
diff --git a/src/hooks/handTracking/useBrowserHandTracking.ts b/src/hooks/handTracking/useBrowserHandTracking.ts
index 73064fa..285fa2f 100644
--- a/src/hooks/handTracking/useBrowserHandTracking.ts
+++ b/src/hooks/handTracking/useBrowserHandTracking.ts
@@ -2,17 +2,20 @@ import { useEffect, useRef, useState } from "react";
 import {
   HAND_TRACKING_FRAME_HEIGHT,
   HAND_TRACKING_FRAME_WIDTH,
+  HAND_TRACKING_RUNTIME_START_DELAY_MS,
   HAND_TRACKING_TARGET_FPS,
 } from "@/data/handTrackingConfig";
 import {
   convertBrowserHandResult,
   getBrowserHandLandmarker,
+  releaseBrowserHandLandmarker,
 } from "@/lib/handTracking/browserHandTracking";
 import {
   INITIAL_HAND_TRACKING_SNAPSHOT,
   getCameraStreamWithTimeout,
 } from "@/lib/handTracking/handTrackingSession";
 import type { HandTrackingSnapshot } from "@/types/handTracking/handTracking";
+import { logger } from "@/utils/core/Logger";
 
 interface UseBrowserHandTrackingOptions {
   enabled: boolean;
@@ -34,8 +37,12 @@ export function useBrowserHandTracking({
     }
 
     let cancelled = false;
+    let cleanedUp = false;
 
     const cleanup = (): void => {
+      if (cleanedUp) return;
+      cleanedUp = true;
+
       if (intervalRef.current !== null) {
         window.clearInterval(intervalRef.current);
         intervalRef.current = null;
@@ -44,6 +51,7 @@ export function useBrowserHandTracking({
       streamRef.current?.getTracks().forEach((track) => track.stop());
       streamRef.current = null;
       videoRef.current = null;
+      releaseBrowserHandLandmarker();
     };
 
     const start = async (): Promise<void> => {
@@ -111,24 +119,44 @@ export function useBrowserHandTracking({
         intervalRef.current = window.setInterval(() => {
           if (video.readyState < HTMLMediaElement.HAVE_CURRENT_DATA) return;
 
-          const result = handLandmarker.detectForVideo(
-            video,
-            performance.now(),
-          );
-          const hands = convertBrowserHandResult(result);
+          try {
+            const result = handLandmarker.detectForVideo(
+              video,
+              performance.now(),
+            );
+            const hands = convertBrowserHandResult(result);
 
-          setSnapshot((current) => ({
-            ...current,
-            hands,
-            usageStatus: hands.some((hand) => hand.isFist)
-              ? "active"
-              : "available",
-            error: null,
-          }));
+            setSnapshot((current) => ({
+              ...current,
+              hands,
+              usageStatus: hands.some((hand) => hand.isFist)
+                ? "active"
+                : "available",
+              error: null,
+            }));
+          } catch (error) {
+            logger.error("HandTracking", "Browser JS runtime error", {
+              error: error instanceof Error ? error.message : String(error),
+            });
+            cleanup();
+            setSnapshot({
+              hands: [],
+              status: "error",
+              usageStatus: "inactive",
+              serverStatus: "Browser JS",
+              error:
+                error instanceof Error
+                  ? error.message
+                  : "Browser hand tracking failed",
+            });
+          }
         }, 1_000 / HAND_TRACKING_TARGET_FPS);
       } catch (error) {
         if (cancelled) return;
 
+        logger.error("HandTracking", "Browser JS runtime failed", {
+          error: error instanceof Error ? error.message : String(error),
+        });
         setSnapshot({
           hands: [],
           status: "error",
@@ -142,10 +170,17 @@ export function useBrowserHandTracking({
       }
     };
 
-    void start();
+    // Delay the actual start so that a StrictMode mount/unmount/mount
+    // cycle, or a rapid `enabled` toggle at a trigger border, does not
+    // spin up the camera + MediaPipe twice in a few milliseconds.
+    const startTimer = window.setTimeout(() => {
+      if (cancelled) return;
+      void start();
+    }, HAND_TRACKING_RUNTIME_START_DELAY_MS);
 
     return () => {
       cancelled = true;
+      window.clearTimeout(startTimer);
       cleanup();
     };
   }, [enabled]);
diff --git a/src/hooks/handTracking/useRemoteHandTracking.ts b/src/hooks/handTracking/useRemoteHandTracking.ts
index f53236d..fafa568 100644
--- a/src/hooks/handTracking/useRemoteHandTracking.ts
+++ b/src/hooks/handTracking/useRemoteHandTracking.ts
@@ -4,6 +4,7 @@ import {
   HAND_TRACKING_FRAME_WIDTH,
   HAND_TRACKING_JPEG_QUALITY,
   HAND_TRACKING_RESPONSE_TIMEOUT_MS,
+  HAND_TRACKING_RUNTIME_START_DELAY_MS,
   HAND_TRACKING_TARGET_FPS,
 } from "@/data/handTrackingConfig";
 import { getHandTrackingWsUrl } from "@/utils/handTracking/handTrackingEndpoint";
@@ -17,6 +18,7 @@ import type {
   HandTrackingServerMessage,
   HandTrackingSnapshot,
 } from "@/types/handTracking/handTracking";
+import { logger } from "@/utils/core/Logger";
 
 interface UseRemoteHandTrackingOptions {
   enabled: boolean;
@@ -100,6 +102,7 @@ export function useRemoteHandTracking({
     }
 
     let cancelled = false;
+    let cleanedUp = false;
 
     const clearResponseTimeout = (): void => {
       if (responseTimeoutRef.current === null) return;
@@ -108,6 +111,9 @@ export function useRemoteHandTracking({
     };
 
     const cleanup = (): void => {
+      if (cleanedUp) return;
+      cleanedUp = true;
+
       if (sendIntervalRef.current !== null) {
         window.clearInterval(sendIntervalRef.current);
         sendIntervalRef.current = null;
@@ -283,6 +289,9 @@ export function useRemoteHandTracking({
         };
         ws.onerror = () => {
           markResponseReceived();
+          logger.error("HandTracking", "Backend WebSocket error", {
+            websocketUrl,
+          });
           setSnapshot((current) => ({
             ...current,
             status: "error",
@@ -307,6 +316,10 @@ export function useRemoteHandTracking({
         );
       } catch (error) {
         if (cancelled) return;
+        logger.error("HandTracking", "Backend runtime failed", {
+          error: error instanceof Error ? error.message : String(error),
+          websocketUrl,
+        });
         setSnapshot({
           hands: [],
           status: "error",
@@ -318,10 +331,17 @@ export function useRemoteHandTracking({
       }
     };
 
-    void start();
+    // Delay the actual start so that a StrictMode mount/unmount/mount
+    // cycle, or a rapid `enabled` toggle at a trigger border, does not
+    // open the camera + WebSocket twice in a few milliseconds.
+    const startTimer = window.setTimeout(() => {
+      if (cancelled) return;
+      void start();
+    }, HAND_TRACKING_RUNTIME_START_DELAY_MS);
 
     return () => {
       cancelled = true;
+      window.clearTimeout(startTimer);
       cleanup();
     };
   }, [enabled, websocketUrl]);
diff --git a/src/index.css b/src/index.css
index 0eb57e5..5a47469 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1544,7 +1544,7 @@ canvas {
 }
 
 .game-settings-menu__choice-group--presets {
-  grid-template-columns: repeat(4, minmax(0, 1fr));
+  grid-template-columns: repeat(5, minmax(0, 1fr));
 }
 
 .game-settings-menu__choice-group button,
diff --git a/src/lib/handTracking/browserHandTracking.ts b/src/lib/handTracking/browserHandTracking.ts
index 06b80b4..5daf76e 100644
--- a/src/lib/handTracking/browserHandTracking.ts
+++ b/src/lib/handTracking/browserHandTracking.ts
@@ -1,4 +1,5 @@
 import {
+  HAND_TRACKING_BROWSER_DELEGATE,
   HAND_TRACKING_BROWSER_MODEL_URL,
   HAND_TRACKING_BROWSER_WASM_URL,
 } from "@/data/handTrackingConfig";
@@ -6,6 +7,7 @@ import type {
   HandTrackingHand,
   HandTrackingLandmark,
 } from "@/types/handTracking/handTracking";
+import { logger } from "@/utils/core/Logger";
 
 type HandLandmarkerModule = typeof import("@mediapipe/tasks-vision");
 type HandLandmarker = Awaited<
@@ -14,6 +16,7 @@ type HandLandmarker = Awaited<
 type HandLandmarkerResult = ReturnType<HandLandmarker["detectForVideo"]>;
 
 let handLandmarkerPromise: Promise<HandLandmarker> | null = null;
+let handLandmarkerInstance: HandLandmarker | null = null;
 
 function averageLandmarks(
   landmarks: HandTrackingLandmark[],
@@ -78,20 +81,46 @@ export async function getBrowserHandLandmarker(): Promise<HandLandmarker> {
         HAND_TRACKING_BROWSER_WASM_URL,
       );
 
-      return HandLandmarker.createFromOptions(vision, {
+      const handLandmarker = await HandLandmarker.createFromOptions(vision, {
         baseOptions: {
           modelAssetPath: HAND_TRACKING_BROWSER_MODEL_URL,
-          delegate: "GPU",
+          delegate: HAND_TRACKING_BROWSER_DELEGATE,
         },
         numHands: 2,
         runningMode: "VIDEO",
       });
+
+      handLandmarkerInstance = handLandmarker;
+      return handLandmarker;
     },
   );
 
   return handLandmarkerPromise;
 }
 
+export function releaseBrowserHandLandmarker(): void {
+  const activeLandmarker = handLandmarkerInstance;
+  const pendingLandmarker = handLandmarkerPromise;
+
+  handLandmarkerInstance = null;
+  handLandmarkerPromise = null;
+
+  if (activeLandmarker) {
+    activeLandmarker.close();
+    return;
+  }
+
+  void pendingLandmarker
+    ?.then((landmarker) => {
+      landmarker.close();
+    })
+    .catch((error: unknown) => {
+      logger.warn("HandTracking", "Browser JS landmarker release failed", {
+        error: error instanceof Error ? error.message : String(error),
+      });
+    });
+}
+
 export function convertBrowserHandResult(
   result: HandLandmarkerResult,
 ): HandTrackingHand[] {
diff --git a/src/pages/page.tsx b/src/pages/page.tsx
index 996a285..d6b42a5 100644
--- a/src/pages/page.tsx
+++ b/src/pages/page.tsx
@@ -15,7 +15,9 @@ import {
 } from "@/components/ui/intro";
 import { SceneLoadingOverlay } from "@/components/ui/SceneLoadingOverlay";
 import { INITIAL_SCENE_LOADING_STATE } from "@/data/world/sceneLoadingConfig";
+import { useDebugStore } from "@/hooks/debug/useDebugStore";
 import { useTransientLoadingIndicator } from "@/hooks/ui/useTransientLoadingIndicator";
+import { releaseBrowserHandLandmarker } from "@/lib/handTracking/browserHandTracking";
 import { AudioManager } from "@/managers/AudioManager";
 import { useGameStore } from "@/managers/stores/useGameStore";
 import { useWorldSettingsStore } from "@/managers/stores/useWorldSettingsStore";
@@ -26,6 +28,9 @@ import { logger } from "@/utils/core/Logger";
 import { World } from "@/world/World";
 
 const LOADING_TO_VIDEO_FADE_MS = 500;
+const WEBGL_CONTEXT_RESTORE_DELAY_MS = 500;
+const CANVAS_DPR: [number, number] = [1, 1];
+const registeredWebglContextCanvases = new WeakSet<HTMLCanvasElement>();
 
 export function HomePage(): React.JSX.Element | null {
   const navigate = useNavigate();
@@ -38,6 +43,11 @@ export function HomePage(): React.JSX.Element | null {
   const graphicsPreset = useWorldSettingsStore(
     (state) => state.graphics.preset,
   );
+  const cameraMode = useDebugStore((debug) => debug.getCameraMode());
+  const handTrackingSource = useDebugStore((debug) =>
+    debug.getHandTrackingSource(),
+  );
+  const sceneMode = useDebugStore((debug) => debug.getSceneMode());
   const dialogMessage = useGameStore(
     (state) => state.missionFlow.dialogMessage,
   );
@@ -48,9 +58,18 @@ export function HomePage(): React.JSX.Element | null {
     INITIAL_SCENE_LOADING_STATE,
   );
   const sceneReadyRef = useRef(false);
+  const cameraModeRef = useRef(cameraMode);
+  const handTrackingSourceRef = useRef(handTrackingSource);
+  const sceneModeRef = useRef(sceneMode);
   const runtimeLoadingSignal = `${graphicsPreset}:${mainState}:${ebikeStep}:${pylonStep}:${farmStep}`;
   const previousRuntimeLoadingSignalRef = useRef(runtimeLoadingSignal);
 
+  useEffect(() => {
+    cameraModeRef.current = cameraMode;
+    handTrackingSourceRef.current = handTrackingSource;
+    sceneModeRef.current = sceneMode;
+  }, [cameraMode, handTrackingSource, sceneMode]);
+
   useEffect(() => {
     sceneReadyRef.current = sceneLoadingState.status === "ready";
   }, [sceneLoadingState.status]);
@@ -138,11 +157,25 @@ export function HomePage(): React.JSX.Element | null {
       // page stays frozen on a black canvas until the user reloads.
       const loseContextExt = gl.getContext().getExtension("WEBGL_lose_context");
 
+      if (registeredWebglContextCanvases.has(canvas)) return;
+      registeredWebglContextCanvases.add(canvas);
+
       const handleContextLost = (event: Event) => {
         event.preventDefault();
-        logger.error("WebGL", "Context lost - attempting auto-restore");
+        releaseBrowserHandLandmarker();
+
+        logger.error("WebGL", "Context lost - attempting auto-restore", {
+          cameraMode: cameraModeRef.current,
+          geometries: gl.info.memory.geometries,
+          handTrackingSource: handTrackingSourceRef.current,
+          sceneMode: sceneModeRef.current,
+          textures: gl.info.memory.textures,
+        });
         // Give the GPU a moment to free resources before asking it back.
-        window.setTimeout(() => loseContextExt?.restoreContext(), 500);
+        window.setTimeout(
+          () => loseContextExt?.restoreContext(),
+          WEBGL_CONTEXT_RESTORE_DELAY_MS,
+        );
       };
 
       const handleContextRestored = () => {
@@ -150,7 +183,11 @@ export function HomePage(): React.JSX.Element | null {
         gl.shadowMap.type = THREE.PCFShadowMap;
         gl.shadowMap.autoUpdate = true;
         gl.shadowMap.needsUpdate = true;
-        logger.info("WebGL", "Context restored");
+        logger.info("WebGL", "Context restored", {
+          cameraMode: cameraModeRef.current,
+          handTrackingSource: handTrackingSourceRef.current,
+          sceneMode: sceneModeRef.current,
+        });
       };
 
       canvas.addEventListener("webglcontextlost", handleContextLost);
@@ -191,10 +228,12 @@ export function HomePage(): React.JSX.Element | null {
     <HandTrackingProvider>
       <Canvas
         camera={{ position: [85, 60, 85], fov: 42 }}
+        dpr={CANVAS_DPR}
+        id="game-canvas"
         shadows={{ type: THREE.PCFShadowMap }}
         gl={{
           powerPreference: "high-performance",
-          antialias: true,
+          antialias: false,
           stencil: false,
         }}
         onCreated={handleCanvasCreated}
diff --git a/src/utils/debug/Debug.ts b/src/utils/debug/Debug.ts
index 7c9606b..24df6fe 100644
--- a/src/utils/debug/Debug.ts
+++ b/src/utils/debug/Debug.ts
@@ -1,9 +1,11 @@
 import GUI from "lil-gui";
+import type { Controller } from "lil-gui";
 import type { CameraMode, SceneMode } from "@/types/debug/debug";
 import type { HandTrackingSource } from "@/types/handTracking/handTracking";
 import { FOG_CONFIG } from "@/data/world/fogConfig";
 import { EventEmitter } from "@/utils/core/EventEmitter";
 import { isDebugEnabled } from "@/utils/debug/isDebugEnabled";
+import { logger } from "@/utils/core/Logger";
 
 const DEBUG_CONTROLS_STORAGE_KEY = "la-fabrik-debug-controls";
 
@@ -77,6 +79,7 @@ export class Debug {
   private readonly events = new EventEmitter<DebugEvents>();
   private readonly folders = new Map<string, GUI>();
   private readonly folderRefCounts = new Map<string, number>();
+  private handTrackingSourceController: Controller | null = null;
   private readonly controls: {
     cameraMode: CameraMode;
     fogEnabled: boolean;
@@ -160,16 +163,22 @@ export class Debug {
           this.emit();
         });
 
-      handTrackingFolder
-        ?.add(this.controls, "handTrackingSource", {
-          "Browser JS": "browser",
-          Backend: "backend",
-        })
-        .name("Source")
-        .onChange((value: HandTrackingSource) => {
-          this.controls.handTrackingSource = value;
-          this.saveAndEmit();
-        });
+      this.handTrackingSourceController =
+        handTrackingFolder
+          ?.add(this.controls, "handTrackingSource", {
+            "Browser JS": "browser",
+            Backend: "backend",
+          })
+          .name("Source")
+          .onChange((value: HandTrackingSource) => {
+            const previousSource = this.controls.handTrackingSource;
+            this.controls.handTrackingSource = value;
+            logger.info("HandTracking", "Debug source changed", {
+              from: previousSource,
+              to: value,
+            });
+            this.saveAndEmit();
+          }) ?? null;
     }
   }
 
@@ -254,7 +263,13 @@ export class Debug {
   }
 
   setHandTrackingSource(value: HandTrackingSource): void {
+    const previousSource = this.controls.handTrackingSource;
     this.controls.handTrackingSource = value;
+    this.handTrackingSourceController?.updateDisplay();
+    logger.info("HandTracking", "Settings source changed", {
+      from: previousSource,
+      to: value,
+    });
     this.saveAndEmit();
   }
 
diff --git a/src/utils/three/optimizeGLTFScene.ts b/src/utils/three/optimizeGLTFScene.ts
index 710ebbb..eec91eb 100644
--- a/src/utils/three/optimizeGLTFScene.ts
+++ b/src/utils/three/optimizeGLTFScene.ts
@@ -19,20 +19,21 @@ type TexturedMaterial = THREE.Material &
   Partial<Record<TextureKey, THREE.Texture>>;
 
 const optimizedTextures = new WeakSet<THREE.Texture>();
+const MAX_GLTF_TEXTURE_ANISOTROPY = 2;
 
 function optimizeTexture(texture: THREE.Texture, maxAnisotropy: number): void {
   if (optimizedTextures.has(texture)) return;
 
   optimizedTextures.add(texture);
-  texture.anisotropy = Math.min(4, Math.max(1, maxAnisotropy));
+  const nextAnisotropy = Math.min(
+    MAX_GLTF_TEXTURE_ANISOTROPY,
+    Math.max(1, maxAnisotropy),
+  );
 
-  if (!(texture instanceof THREE.CompressedTexture)) {
-    texture.generateMipmaps = true;
-    texture.minFilter = THREE.LinearMipmapLinearFilter;
-    texture.magFilter = THREE.LinearFilter;
+  if (texture.anisotropy > nextAnisotropy) {
+    texture.anisotropy = nextAnisotropy;
+    texture.needsUpdate = true;
   }
-
-  texture.needsUpdate = true;
 }
 
 function optimizeMaterialTextures(
diff --git a/src/world/World.tsx b/src/world/World.tsx
index 0b45210..1c14e31 100644
--- a/src/world/World.tsx
+++ b/src/world/World.tsx
@@ -31,11 +31,20 @@ import { CharacterSystem } from "@/world/characters/CharacterSystem";
 import { Player } from "@/world/player/Player";
 import { TestMap } from "@/world/debug/TestMap";
 import type { SceneLoadingChangeHandler } from "@/types/world/sceneLoading";
+import type { HandTrackingGloveHandedness } from "@/hooks/handTracking/useHandTrackingGloveStatus";
+import type { HandTrackingHand } from "@/types/handTracking/handTracking";
 
 interface WorldProps {
   onLoadingStateChange?: SceneLoadingChangeHandler | undefined;
 }
 
+function hasTrackedHand(
+  hands: HandTrackingHand[],
+  handedness: HandTrackingGloveHandedness,
+): boolean {
+  return hands.some((hand) => hand.handedness.toLowerCase() === handedness);
+}
+
 export function World({ onLoadingStateChange }: WorldProps): React.JSX.Element {
   useEnvironmentDebug();
   useMapPerformanceDebug();
@@ -49,7 +58,7 @@ export function World({ onLoadingStateChange }: WorldProps): React.JSX.Element {
     (state) => state.showPlayerModel,
   );
   const showDebugOctree = useDebugVisualsStore((state) => state.showOctree);
-  const { status, usageStatus } = useHandTrackingSnapshot();
+  const { hands, status, usageStatus } = useHandTrackingSnapshot();
   const {
     octree,
     gameplayReady,
@@ -63,8 +72,11 @@ export function World({ onLoadingStateChange }: WorldProps): React.JSX.Element {
       ? PLAYER_SPAWN_POSITION_GAME
       : PLAYER_SPAWN_POSITION_PHYSICS;
   const showHandTrackingGloves =
-    sceneMode === "physics" ||
-    (status !== "idle" && usageStatus !== "inactive");
+    status === "connected" && usageStatus !== "inactive" && hands.length > 0;
+  const showLeftHandTrackingGlove =
+    showHandTrackingGloves && hasTrackedHand(hands, "left");
+  const showRightHandTrackingGlove =
+    showHandTrackingGloves && hasTrackedHand(hands, "right");
   const spawnPlayer =
     cameraMode !== "debug" &&
     (sceneMode === "game" ? gameplayReady : octree !== null);
@@ -82,8 +94,12 @@ export function World({ onLoadingStateChange }: WorldProps): React.JSX.Element {
       ) : null}
       {showHandTrackingGloves ? (
         <Suspense fallback={null}>
-          <HandTrackingGlove handedness="left" />
-          <HandTrackingGlove handedness="right" />
+          {showLeftHandTrackingGlove ? (
+            <HandTrackingGlove handedness="left" />
+          ) : null}
+          {showRightHandTrackingGlove ? (
+            <HandTrackingGlove handedness="right" />
+          ) : null}
         </Suspense>
       ) : null}
       {cameraMode === "debug" ? <DebugCameraControls /> : null}
diff --git a/src/world/debug/TestMap.tsx b/src/world/debug/TestMap.tsx
index 0056b21..e1d74b9 100644
--- a/src/world/debug/TestMap.tsx
+++ b/src/world/debug/TestMap.tsx
@@ -17,6 +17,8 @@ import {
   TEST_SCENE_GRABBABLE_METALNESS,
   TEST_SCENE_GRABBABLE_POSITION,
   TEST_SCENE_GRABBABLE_ROUGHNESS,
+  TEST_SCENE_GPS_PREVIEW_POSITION,
+  TEST_SCENE_GPS_PREVIEW_ROTATION,
   GAME_REPAIR_ZONES,
   TEST_SCENE_REPAIR_ZONE_MARKER_RADIUS,
   TEST_SCENE_REPAIR_ZONE_MARKER_TUBE_RADIUS,
@@ -110,24 +112,17 @@ export function TestMap({ onOctreeReady }: TestMapProps): React.JSX.Element {
       try {
         const parsed = JSON.parse(saved);
         if (Array.isArray(parsed) && parsed.length > 0) {
-          console.log(
-            `[TestMap] ${parsed.length} waypoints chargés depuis localStorage.`,
-          );
           // Schedule state update to avoid synchronous setState in effect
           queueMicrotask(() => {
             if (!cancelled) setWaypoints(parsed);
           });
           return;
         }
-      } catch (e) {
-        console.error("Failed to parse local storage waypoints", e);
+      } catch {
+        // Ignore parse errors — fall through to fetch fallback
       }
     }
 
-    // 2. Try public/roadNetwork.json
-    console.log(
-      "[TestMap] Tentative de chargement depuis /roadNetwork.json...",
-    );
     fetch("/roadNetwork.json")
       .then((res) => {
         if (res.ok) return res.json();
@@ -136,14 +131,11 @@ export function TestMap({ onOctreeReady }: TestMapProps): React.JSX.Element {
       .then((data) => {
         if (cancelled) return;
         if (Array.isArray(data)) {
-          console.log(
-            `[TestMap] ${data.length} waypoints chargés depuis /roadNetwork.json.`,
-          );
           setWaypoints(data);
         }
       })
-      .catch((err) => {
-        console.log("[TestMap] Aucun point d'A* trouvé par défaut.", err);
+      .catch(() => {
+        // No A* waypoints available — silent fallback
       });
 
     return () => {
@@ -253,7 +245,10 @@ export function TestMap({ onOctreeReady }: TestMapProps): React.JSX.Element {
       </Physics>
 
       {/* Dynamic Futuristic 3D GPS Dashboard Preview */}
-      <group position={[0, 2.8, -4.8]} rotation={[0, 0, 0]}>
+      <group
+        position={TEST_SCENE_GPS_PREVIEW_POSITION}
+        rotation={TEST_SCENE_GPS_PREVIEW_ROTATION}
+      >
         {/* Futuristic glowing screen frame (commented out to show true 3D transparency!) */}
         {/*
         <mesh>
diff --git a/src/world/map-instancing/MapInstancingSystem.tsx b/src/world/map-instancing/MapInstancingSystem.tsx
index c5be5e9..1cb4c10 100644
--- a/src/world/map-instancing/MapInstancingSystem.tsx
+++ b/src/world/map-instancing/MapInstancingSystem.tsx
@@ -149,6 +149,7 @@ export function MapInstancingSystem({
   const streamingEnabled =
     streaming &&
     CHUNK_CONFIG.enabled &&
+    graphicsPresetConfig.chunkStreamingEnabled &&
     sceneMode === "game" &&
     cameraMode === "player";
 
diff --git a/src/world/player/PlayerCamera.tsx b/src/world/player/PlayerCamera.tsx
index 3a120a2..ca60af0 100644
--- a/src/world/player/PlayerCamera.tsx
+++ b/src/world/player/PlayerCamera.tsx
@@ -1,18 +1,29 @@
 import { useEffect } from "react";
 import { useThree } from "@react-three/fiber";
 import { PointerLockControls } from "@react-three/drei";
+import { useSettingsStore } from "@/managers/stores/useSettingsStore";
 import { setGlobalCamera } from "@/world/GameCinematics";
 
 export function PlayerCamera(): React.JSX.Element {
   const camera = useThree((state) => state.camera);
+  const isSettingsMenuOpen = useSettingsStore(
+    (state) => state.isSettingsMenuOpen,
+  );
 
   useEffect(() => {
     setGlobalCamera(camera);
     return () => {
       setGlobalCamera(null);
-      document.exitPointerLock();
+      if (document.pointerLockElement) {
+        document.exitPointerLock();
+      }
     };
   }, [camera]);
 
-  return <PointerLockControls />;
+  return (
+    <PointerLockControls
+      enabled={!isSettingsMenuOpen}
+      selector="#game-canvas"
+    />
+  );
 }
diff --git a/src/world/player/PlayerController.tsx b/src/world/player/PlayerController.tsx
index a42c7f5..cfe3dd9 100644
--- a/src/world/player/PlayerController.tsx
+++ b/src/world/player/PlayerController.tsx
@@ -34,6 +34,7 @@ import {
   EBIKE_CAMERA_TRANSFORM,
   EBIKE_DECELERATION_DURATION_MS,
 } from "@/data/ebike/ebikeConfig";
+import { useSceneMode } from "@/hooks/debug/useSceneMode";
 
 /** Global window properties used for ebike communication */
 interface EbikeGlobalState {
@@ -152,6 +153,7 @@ export function PlayerController({
   spawnPosition,
 }: PlayerControllerProps): null {
   const camera = useThree((state) => state.camera);
+  const sceneMode = useSceneMode();
   const movementLocked = useRepairMovementLocked();
   const terrainHeight = useTerrainHeightSampler();
   const movementLockedRef = useRef(movementLocked);
@@ -483,19 +485,21 @@ export function PlayerController({
       }
     }
 
-    const groundHeight = terrainHeight.getHeight(
-      capsule.current.end.x,
-      capsule.current.end.z,
-    );
-    if (groundHeight !== null && velocity.current.y <= 0) {
-      const groundOffset = getCapsuleFootY(capsule.current) - groundHeight;
+    if (sceneMode === "game") {
+      const groundHeight = terrainHeight.getHeight(
+        capsule.current.end.x,
+        capsule.current.end.z,
+      );
+      if (groundHeight !== null && velocity.current.y <= 0) {
+        const groundOffset = getCapsuleFootY(capsule.current) - groundHeight;
 
-      if (groundOffset <= PLAYER_GROUND_SNAP_DISTANCE) {
-        capsule.current.translate(
-          _collisionCorrection.set(0, -groundOffset, 0),
-        );
-        velocity.current.y = 0;
-        onFloor.current = true;
+        if (groundOffset <= PLAYER_GROUND_SNAP_DISTANCE) {
+          capsule.current.translate(
+            _collisionCorrection.set(0, -groundOffset, 0),
+          );
+          velocity.current.y = 0;
+          onFloor.current = true;
+        }
       }
     }
 
diff --git a/src/world/vegetation/VegetationSystem.tsx b/src/world/vegetation/VegetationSystem.tsx
index ef07b55..a9f6431 100644
--- a/src/world/vegetation/VegetationSystem.tsx
+++ b/src/world/vegetation/VegetationSystem.tsx
@@ -1,8 +1,24 @@
-import { Suspense, useMemo } from "react";
+import {
+  Suspense,
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from "react";
+import { useFrame, useThree } from "@react-three/fiber";
 import { CHUNK_CONFIG } from "@/data/world/chunkStreamingConfig";
+import {
+  getMapLodModelPath,
+  getMapLodScaleMultiplier,
+  selectMapModelPathByDistance,
+} from "@/data/world/mapLodConfig";
 import { useCameraMode } from "@/hooks/debug/useCameraMode";
 import { useSceneMode } from "@/hooks/debug/useSceneMode";
-import { useGraphicsPresetConfig } from "@/hooks/world/useGraphicsSettings";
+import {
+  useGraphicsPreset,
+  useGraphicsPresetConfig,
+} from "@/hooks/world/useGraphicsSettings";
 import { useVisibleWorldChunks } from "@/hooks/world/useVisibleWorldChunks";
 import {
   isMapModelVisible,
@@ -18,6 +34,7 @@ import {
 } from "@/data/world/vegetationConfig";
 import { isInsideLaFabrikFootprint } from "@/data/world/laFabrikConfig";
 import { createWorldInstanceChunks } from "@/utils/world/chunkInstances";
+import type { GraphicsPreset } from "@/data/world/graphicsConfig";
 
 interface VegetationSystemProps {
   onlyMapName?: string | null;
@@ -70,12 +87,78 @@ function removeLaFabrikVegetation(
   });
 }
 
+function areChunkModelPathsEqual(
+  a: ReadonlyMap<string, string>,
+  b: ReadonlyMap<string, string>,
+): boolean {
+  return (
+    a.size === b.size && [...a].every(([key, value]) => b.get(key) === value)
+  );
+}
+
+function useVegetationChunkModelPaths(
+  chunks: readonly VegetationChunk[],
+  preset: GraphicsPreset,
+): ReadonlyMap<string, string> {
+  const camera = useThree((state) => state.camera);
+  const lastUpdateRef = useRef(-CHUNK_CONFIG.updateInterval);
+  const modelPathsRef = useRef<Map<string, string>>(new Map());
+  const [modelPaths, setModelPaths] = useState<ReadonlyMap<string, string>>(
+    () => new Map(),
+  );
+
+  const updateModelPaths = useCallback(() => {
+    const cameraX = camera.position.x;
+    const cameraZ = camera.position.z;
+    const next = new Map<string, string>();
+
+    for (const chunk of chunks) {
+      let nearestDistance = Number.POSITIVE_INFINITY;
+      for (const instance of chunk.instances) {
+        const distance = Math.hypot(
+          instance.position[0] - cameraX,
+          instance.position[2] - cameraZ,
+        );
+        if (distance < nearestDistance) nearestDistance = distance;
+      }
+
+      const modelPath = selectMapModelPathByDistance({
+        distance: nearestDistance,
+        modelName: VEGETATION_TYPES[chunk.type].mapName,
+        modelPath: chunk.modelPath,
+        preset,
+      });
+      next.set(chunk.key, modelPath);
+    }
+
+    if (areChunkModelPathsEqual(next, modelPathsRef.current)) return;
+
+    modelPathsRef.current = next;
+    setModelPaths(next);
+  }, [camera, chunks, preset]);
+
+  useEffect(() => {
+    updateModelPaths();
+  }, [updateModelPaths]);
+
+  useFrame(({ clock }) => {
+    const now = clock.elapsedTime * 1000;
+    if (now - lastUpdateRef.current < CHUNK_CONFIG.updateInterval) return;
+    lastUpdateRef.current = now;
+
+    updateModelPaths();
+  });
+
+  return modelPaths;
+}
+
 export function VegetationSystem({
   onlyMapName = null,
   streaming = true,
 }: VegetationSystemProps): React.JSX.Element | null {
   const cameraMode = useCameraMode();
   const sceneMode = useSceneMode();
+  const graphicsPresetKey = useGraphicsPreset();
   const graphicsPreset = useGraphicsPresetConfig();
   const groups = useMapPerformanceStore((state) => state.groups);
   const models = useMapPerformanceStore((state) => state.models);
@@ -83,6 +166,7 @@ export function VegetationSystem({
   const streamingEnabled =
     streaming &&
     CHUNK_CONFIG.enabled &&
+    graphicsPreset.chunkStreamingEnabled &&
     sceneMode === "game" &&
     cameraMode === "player";
 
@@ -112,25 +196,38 @@ export function VegetationSystem({
     unloadRadius: graphicsPreset.chunkUnloadRadius,
   });
 
+  const chunkModelPaths = useVegetationChunkModelPaths(
+    visibleChunks,
+    graphicsPresetKey,
+  );
+
   if (isLoading || !data) {
     return null;
   }
 
   return (
     <group name="vegetation-system">
-      {visibleChunks.map((chunk) => (
-        <Suspense key={chunk.key} fallback={null}>
-          <InstancedVegetation
-            modelPath={chunk.modelPath}
-            instances={chunk.instances}
-            scaleMultiplier={chunk.scaleMultiplier}
-            castShadow={chunk.castShadow}
-            receiveShadow={chunk.receiveShadow}
-            windStrength={chunk.windStrength}
-            rotationOffset={chunk.rotationOffset}
-          />
-        </Suspense>
-      ))}
+      {visibleChunks.map((chunk) => {
+        const modelPath = chunkModelPaths.get(chunk.key) ?? chunk.modelPath;
+        const mapName = VEGETATION_TYPES[chunk.type].mapName;
+        const isLod = modelPath === getMapLodModelPath(mapName);
+        const scaleMultiplier =
+          chunk.scaleMultiplier *
+          (isLod ? getMapLodScaleMultiplier(mapName) : 1);
+        return (
+          <Suspense key={`${chunk.key}:${modelPath}`} fallback={null}>
+            <InstancedVegetation
+              modelPath={modelPath}
+              instances={chunk.instances}
+              scaleMultiplier={scaleMultiplier}
+              castShadow={chunk.castShadow}
+              receiveShadow={chunk.receiveShadow}
+              windStrength={chunk.windStrength}
+              rotationOffset={chunk.rotationOffset}
+            />
+          </Suspense>
+        );
+      })}
     </group>
   );
 }