3D Model Optimization for Game Engines — Unity & Unreal Guide

AI-generated GLB models import directly into Unity and Unreal, but need optimization: LODs, colliders, and material setup.

Unity Import

Drag GLB into Assets. Configure: Scale Factor 1.0, Mesh Compression off, Read/Write enabled.

Use glTF Exporter plugin. File → Import Into Level → select GLB. Replace materials with project master materials.

LOD0: 200K faces (close-up). LOD1: 50K (medium). LOD2: 10K (far). Unity AutoLOD or Unreal built-in LOD system.

Use simplified colliders (box, sphere, capsule, convex mesh). Never use 200K-face mesh colliders — too expensive.

Which format for Unity?

GLB — imports natively with mesh, UV, and PBR materials.

Can AI models be animated?

Yes, with rigging. Import OBJ into Blender, create armature, weight-paint, and rig.