Optimizing 3D models for real-time game rendering primarily involves reducing polygon count, compressing textures, and implementing Level of Detail (LOD) systems to balance visual quality and performance.
Reducing polygon count: Simplify mesh complexity by removing non-essential vertices (e.g., using decimation tools), focusing on retaining critical details for visual integrity. This lowers GPU workload.
Texture compression: Use formats like DXT, ASTC, or BCn to reduce texture file size and memory usage without significant quality loss; combine small textures into atlases to minimize draw calls.
LOD systems: Implement multiple model versions with varying detail levels. Higher-detail models render close to the camera, while lower-detail ones (fewer polygons, simpler textures) activate at distance, reducing rendering demands.
For beginners, start with automated tools for polygon reduction and texture atlasing to streamline initial optimization efforts.