How to optimize a 3D model in game dev?

To optimize a 3D model for game development, reduce polygon count (decimation), simplify textures, use level of detail (LOD) systems, and add normal maps—focus on high-impact assets first. **LODs**: Switch to lower-poly versions at a distance to cut GPU load (use Unity/Unreal’s built-in tools). **Textures**: Merge into atlases to reduce draw calls (fewer texture switches = faster performance). **Normal Maps**: Fake details (wrinkles, scratches) without extra polygons—balances quality and speed. **Practical Steps**: Use Blender’s Decimate modifier for polygons; prioritize main characters/frequent assets—they impact performance most.