To fix overly heavy low poly 3D models, reduce unnecessary polygons while preserving key shapes—this directly lightens files for better performance in real-time uses (games, AR/VR).
Simplify geometry: Merge overlapping vertices to cut redundancy, or use tools like Blender’s Decimate modifier (set to “Collapse” with a 0.2–0.5 ratio) to lower polygons without losing important details.
Replace complex elements: Swap detailed background meshes (e.g., decorative boxes) with basic primitives (cubes)—they use far fewer polygons but still serve their purpose.
By focusing on these steps, you’ll keep models light while maintaining the design’s core look, ideal for performance-dependent projects.