PBR model standard errors
- No more than one texture per type
- Supported material structure
- FBX format
- Centered geometry
- Unsupported object types
- No N-gons
- No non-manifold geometry
- Faceted geometry
- UV unwrapped objects
- No overlapped UVs per UV islands
- Allowed characters
- Missing required textures
- Texture aspect ratio
- Texture with resolution power of 2
- Embedded textures
- No objects without materials