The best way to bake an FBX 3D model involves using software like Blender (free), Substance Painter, or Marmoset Toolbag to transfer high-poly details (e.g., wrinkles, scratches) to a low-poly FBX mesh—preserving UVs and textures while optimizing for real-time apps (games, AR/VR).
Key steps: - Align high/low-poly meshes (same scale/position) and ensure low-poly UVs are non-overlapping—this prevents bake errors. - Choose project-relevant maps: Normal (adds depth), ambient occlusion (adds shadows), or roughness (defines texture smoothness).
For beginners, start with Blender’s Bake panel—import both FBX files, set the high-poly as the "Bake Target," and test a normal map first. It’s cost-free and great for learning core steps like alignment without pressure.