diff --git a/src/data/world/octreeCollisionConfig.ts b/src/data/world/octreeCollisionConfig.ts
new file mode 100644
index 0000000..88e6076
--- /dev/null
+++ b/src/data/world/octreeCollisionConfig.ts
@@ -0,0 +1,57 @@
+import type { Vector3Tuple } from "@/types/three/three";
+
+export interface OctreeCollisionBox {
+  center: Vector3Tuple;
+  size: Vector3Tuple;
+}
+
+export interface MapOctreeCollisionBox extends OctreeCollisionBox {
+  bottomY: number;
+}
+
+export const MAP_OCTREE_COLLISION_BOXES = {
+  immeuble1: {
+    center: [-0.0308, 5.8389, 0],
+    size: [17.2522, 11.6098, 9.2668],
+    bottomY: 0.034,
+  },
+  maison1: {
+    center: [0, 1.3638, 0.0536],
+    size: [2.7813, 3.022, 2.8609],
+    bottomY: -0.1472,
+  },
+} as const satisfies Record<string, MapOctreeCollisionBox>;
+
+export const LA_FABRIK_INTERIOR_COLLISION_BOXES = [
+  {
+    center: [-6.9351, 2.278, -0.0001],
+    size: [0.2, 1.94, 3.711],
+  },
+  {
+    center: [0.8026, 0.719, -3.639],
+    size: [4.346, 1.108, 1.181],
+  },
+  {
+    center: [-5.8519, 0.9362, 2.5742],
+    size: [1.67, 1.551, 2.566],
+  },
+  {
+    center: [-2.0627, 1.4875, -1.2243],
+    size: [0.691, 0.723, 0.687],
+  },
+  {
+    center: [-3.5502, 1.4378, -1.2485],
+    size: [1.055, 0.657, 0.563],
+  },
+] as const satisfies readonly OctreeCollisionBox[];
+
+export const CHARACTER_OCTREE_COLLISION_BOX = {
+  center: [0, 0.875, 0],
+  size: [0.62, 1.75, 0.62],
+} as const satisfies OctreeCollisionBox;
+
+export function hasMapOctreeCollisionBox(
+  name: string,
+): name is keyof typeof MAP_OCTREE_COLLISION_BOXES {
+  return name in MAP_OCTREE_COLLISION_BOXES;
+}
diff --git a/src/world/GameMap.tsx b/src/world/GameMap.tsx
index af31464..3b437d5 100644
--- a/src/world/GameMap.tsx
+++ b/src/world/GameMap.tsx
@@ -27,6 +27,7 @@ import { useMapLodModelPath } from "@/hooks/world/useMapLodModelPath";
 import { GameMapCollision } from "@/world/GameMapCollision";
 import { GeneratedMapNodeInstance } from "@/world/map-generated/GeneratedMapNodeInstance";
 import { isGeneratedMapModelName } from "@/data/world/generatedMapModelConfig";
+import { hasMapOctreeCollisionBox } from "@/data/world/octreeCollisionConfig";
 import { getMapSingleModelScaleMultiplier } from "@/data/world/mapInstancingConfig";
 import { MapInstancingSystem } from "@/world/map-instancing/MapInstancingSystem";
 import type { SceneLoadingChangeHandler } from "@/types/world/sceneLoading";
@@ -115,6 +116,9 @@ export function GameMap({
   const [collisionMapNodes, setCollisionMapNodes] = useState<LoadedMapNode[]>(
     [],
   );
+  const [proxyCollisionMapNodes, setProxyCollisionMapNodes] = useState<
+    MapNode[]
+  >([]);
   const [terrainNode, setTerrainNode] = useState<MapNode | null>(null);
   const [mapLoaded, setMapLoaded] = useState(false);
   const [settledMapNodeCount, setSettledMapNodeCount] = useState(0);
@@ -134,6 +138,7 @@ export function GameMap({
     (currentStep: string) => {
       setRenderMapNodes([]);
       setCollisionMapNodes([]);
+      setProxyCollisionMapNodes([]);
       setTerrainNode(null);
       setMapLoaded(true);
       settledMapNodesRef.current.clear();
@@ -191,6 +196,10 @@ export function GameMap({
             const modelUrl = sceneData.models.get(node.name);
             return { node, modelUrl: modelUrl ?? null };
           });
+        const loadedProxyCollisionNodes = sceneData.mapNodes.filter(
+          (node) =>
+            node.type === "Object3D" && hasMapOctreeCollisionBox(node.name),
+        );
         const loadedTerrainNode = getTerrainMapNode(sceneData.mapNodes);
         const repairMissionAnchors = getRepairMissionMapAnchors(
           sceneData.mapNodes,
@@ -211,6 +220,7 @@ export function GameMap({
 
         setRenderMapNodes(loadedMapNodes);
         setCollisionMapNodes(loadedCollisionNodes);
+        setProxyCollisionMapNodes(loadedProxyCollisionNodes);
         setTerrainNode(loadedTerrainNode);
         setRepairMissionAnchors(repairMissionAnchors);
         setMapLoaded(true);
@@ -285,6 +295,7 @@ export function GameMap({
         buildOctree={buildOctree}
         mapReady={mapReady}
         nodes={collisionMapNodes}
+        proxyNodes={proxyCollisionMapNodes}
         onLoaded={onLoaded}
         onLoadingStateChange={onLoadingStateChange}
         onOctreeReady={onOctreeReady}
diff --git a/src/world/GameMapCollision.tsx b/src/world/GameMapCollision.tsx
index c745ddc..5bce413 100644
--- a/src/world/GameMapCollision.tsx
+++ b/src/world/GameMapCollision.tsx
@@ -17,9 +17,23 @@ import {
   normalizeMapScale,
   useTerrainHeightSampler,
 } from "@/hooks/three/useTerrainHeight";
+import {
+  CHARACTER_CONFIGS,
+  CHARACTER_IDS,
+  type CharacterId,
+} from "@/data/world/characters/characterConfig";
+import {
+  CHARACTER_OCTREE_COLLISION_BOX,
+  LA_FABRIK_INTERIOR_COLLISION_BOXES,
+  MAP_OCTREE_COLLISION_BOXES,
+  hasMapOctreeCollisionBox,
+  type OctreeCollisionBox,
+} from "@/data/world/octreeCollisionConfig";
+import { getMapModelScaleMultiplier } from "@/data/world/mapInstancingConfig";
+import { useCharacterDebugStore } from "@/managers/stores/useCharacterDebugStore";
 import { WorldBoundsCollision } from "@/world/collision/WorldBoundsCollision";
 import type { MapNode } from "@/types/map/mapScene";
-import type { OctreeReadyHandler } from "@/types/three/three";
+import type { OctreeReadyHandler, Vector3Tuple } from "@/types/three/three";
 import type { SceneLoadingChangeHandler } from "@/types/world/sceneLoading";
 import { logModelLoadError } from "@/utils/three/modelLoadLogger";
 
@@ -39,6 +53,7 @@ interface GameMapCollisionProps {
   buildOctree?: boolean;
   mapReady: boolean;
   nodes: readonly GameMapCollisionNode[];
+  proxyNodes: readonly MapNode[];
   onLoaded?: (() => void) | undefined;
   onLoadingStateChange?: SceneLoadingChangeHandler | undefined;
   onOctreeReady: OctreeReadyHandler;
@@ -101,6 +116,7 @@ export function GameMapCollision({
   buildOctree = true,
   mapReady,
   nodes,
+  proxyNodes,
   onLoaded,
   onLoadingStateChange,
   onOctreeReady,
@@ -111,8 +127,23 @@ export function GameMapCollision({
   const [settledCollisionNodeCount, setSettledCollisionNodeCount] = useState(0);
   const terrainHeight = useTerrainHeightSampler();
   const collisionNodes = nodes.filter(isCollisionNode);
+  const collisionSourceCount =
+    collisionNodes.length + proxyNodes.length + CHARACTER_IDS.length;
   const collisionReady =
     mapReady && settledCollisionNodeCount >= collisionNodes.length;
+  const characterCollisionSignature = useCharacterDebugStore((state) =>
+    CHARACTER_IDS.map((id) => {
+      const character = state.characters[id];
+      return [
+        ...character.position,
+        ...character.rotation,
+        ...character.scale,
+      ].join(",");
+    }).join("|"),
+  );
+  const collisionRebuildKey = collisionReady
+    ? `${collisionNodes.length}:${collisionSourceCount}:${characterCollisionSignature}`
+    : "pending";
 
   const notifyLoaded = useCallback(() => {
     if (loadedNotifiedRef.current) return;
@@ -144,14 +175,14 @@ export function GameMapCollision({
   useOctreeGraphNode(
     groupRef,
     handleOctreeReady,
-    collisionReady ? collisionNodes.length : 0,
-    buildOctree && collisionReady && collisionNodes.length > 0,
+    collisionRebuildKey,
+    buildOctree && collisionReady && collisionSourceCount > 0,
   );
 
   useEffect(() => {
     if (!mapReady) return;
 
-    if (collisionNodes.length === 0) {
+    if (collisionSourceCount === 0) {
       notifyLoaded();
       return;
     }
@@ -171,6 +202,7 @@ export function GameMapCollision({
   }, [
     buildOctree,
     collisionNodes.length,
+    collisionSourceCount,
     collisionReady,
     mapReady,
     notifyLoaded,
@@ -180,6 +212,18 @@ export function GameMapCollision({
   return (
     <group ref={groupRef} visible={false}>
       {mapReady ? <WorldBoundsCollision /> : null}
+      {mapReady
+        ? proxyNodes.map((node, index) => (
+            <MapCollisionBoxProxy
+              key={`proxy-collision-${index}`}
+              node={node}
+              terrainHeight={terrainHeight}
+            />
+          ))
+        : null}
+      {mapReady ? (
+        <CharacterCollisionProxies terrainHeight={terrainHeight} />
+      ) : null}
       {mapReady
         ? collisionNodes.map((mapNode, index) => (
             <CollisionErrorBoundary
@@ -253,11 +297,125 @@ function CollisionModelInstance({
   }, [onLoaded]);
 
   return (
-    <primitive
-      object={sceneInstance}
-      position={collisionPosition}
-      rotation={rotation}
-      scale={normalizedScale}
-    />
+    <>
+      <primitive
+        object={sceneInstance}
+        position={collisionPosition}
+        rotation={rotation}
+        scale={normalizedScale}
+      />
+      {node.name === "lafabrik" ? (
+        <group
+          name="lafabrik-interior-collision-proxies"
+          position={collisionPosition}
+          rotation={rotation}
+          scale={normalizedScale}
+        >
+          {LA_FABRIK_INTERIOR_COLLISION_BOXES.map((box, index) => (
+            <CollisionBox key={`lafabrik-interior-${index}`} box={box} />
+          ))}
+        </group>
+      ) : null}
+    </>
+  );
+}
+
+function CollisionBox({ box }: { box: OctreeCollisionBox }): React.JSX.Element {
+  return (
+    <mesh position={box.center}>
+      <boxGeometry args={box.size} />
+      <meshBasicMaterial />
+    </mesh>
+  );
+}
+
+function createScaledMapNodeScale(node: MapNode): Vector3Tuple {
+  const baseScale = normalizeMapScale(node.scale);
+  const scaleMultiplier = getMapModelScaleMultiplier(node.name);
+
+  return [
+    baseScale[0] * scaleMultiplier,
+    baseScale[1] * scaleMultiplier,
+    baseScale[2] * scaleMultiplier,
+  ];
+}
+
+function MapCollisionBoxProxy({
+  node,
+  terrainHeight,
+}: {
+  node: MapNode;
+  terrainHeight: TerrainHeightSampler;
+}): React.JSX.Element | null {
+  const collisionBox = hasMapOctreeCollisionBox(node.name)
+    ? MAP_OCTREE_COLLISION_BOXES[node.name]
+    : null;
+  const normalizedScale = useMemo(() => createScaledMapNodeScale(node), [node]);
+  const position = useMemo(() => {
+    const [x, y, z] = node.position;
+    if (!collisionBox) return [x, y, z] satisfies Vector3Tuple;
+
+    const height = terrainHeight.getHeight(x, z);
+    const bottomOffset = -collisionBox.bottomY * normalizedScale[1];
+
+    return [x, (height ?? y) + bottomOffset, z] satisfies Vector3Tuple;
+  }, [collisionBox, node.position, normalizedScale, terrainHeight]);
+
+  if (!collisionBox) return null;
+
+  return (
+    <group
+      name={`${node.name}-octree-collision-proxy`}
+      position={position}
+      rotation={node.rotation}
+      scale={normalizedScale}
+    >
+      <CollisionBox box={collisionBox} />
+    </group>
+  );
+}
+
+function CharacterCollisionProxies({
+  terrainHeight,
+}: {
+  terrainHeight: TerrainHeightSampler;
+}): React.JSX.Element {
+  return (
+    <>
+      {CHARACTER_IDS.map((id) => (
+        <CharacterCollisionProxy
+          key={`character-collision-${id}`}
+          id={id}
+          terrainHeight={terrainHeight}
+        />
+      ))}
+    </>
+  );
+}
+
+function CharacterCollisionProxy({
+  id,
+  terrainHeight,
+}: {
+  id: CharacterId;
+  terrainHeight: TerrainHeightSampler;
+}): React.JSX.Element {
+  const config = CHARACTER_CONFIGS[id];
+  const state = useCharacterDebugStore((store) => store.characters[id]);
+  const position = useMemo(() => {
+    const [x, y, z] = state.position;
+    const height = terrainHeight.getHeight(x, z);
+
+    return [x, height ?? y, z] satisfies Vector3Tuple;
+  }, [state.position, terrainHeight]);
+
+  return (
+    <group
+      name={`${config.id}-octree-collision-proxy`}
+      position={position}
+      rotation={state.rotation}
+    >
+      <CollisionBox box={CHARACTER_OCTREE_COLLISION_BOX} />
+    </group>
   );
 }