- gant_r/model.gltf: align casing with the actual files on disk
(gant_basecolor / gant_occlusionroughnessmetallic) so the GLTFLoader
stops logging 'Couldn't load texture' on case-sensitive filesystems
- pylone/model.gltf: nine missing Image_N.png references replaced with
the existing color.png / normal.png so the pylone renders without
console errors. Material slots are mapped by role: normalTexture ->
normal.png, baseColorTexture and metallicRoughnessTexture -> color.png