To fix overly heavy high poly 3D models, optimize geometry with three key methods: decimation, retopology, and removing redundant details.
- **Decimation**: Quickly lowers polygon count while preserving the model’s shape—great for fast adjustments. - **Retopology**: Builds a clean low-poly base that retains high-poly detail—ideal for animation or texturing. - **Redundant detail removal**: Deletes hidden/unused edges/faces to cut bloat without altering the visible design.
For beginners, start with Blender’s Decimate modifier—test on a small section first to avoid losing key details.