To fix overly heavy 3D model atlases, focus on three core optimizations: reducing texture resolution, using efficient compression, and trimming unnecessary details.
- **Lower resolution**: Batch-resize textures (e.g., 50% reduction in Blender/Substance Painter) to cut size—test first to retain quality without issues. - **Use compression**: Opt for formats like JPEG, PNG8 (simple visuals) or GPU-specific options (BCn, ETC2) that balance quality and file size.
These steps minimize weight while keeping models usable—vital for smooth game frame rates or fast web 3D load times.