Four environments from above / Round 05

28 standalone GLB files: four complete scenes and six thematic prop groups
for each scene. Settings: desert, shrine, rail and grotto. All use the selected
PS1/retro 3D treatment. File names are setting-ps1-view.glb.

Each file includes meshes, transforms, normals, UVs, diffuse textures and simple
materials. Y is up; a scene unit is approximately one meter. The HTML viewer
supplies lighting, shadows, high overview cameras and reduced raster resolution.

Every file was loaded back through Three.js GLTFLoader r128. Geometry counts
and bounds matched. See manifest.json for the file list and verification data.

These are static environment studies. Components remain separate for inspection
and reuse; no game-specific collision or animation is included.
