How to fix weird in weight painting 3D models?

To fix weird weight painting results on 3D models, start by checking overlapping vertices, adjusting brush settings (strength/falloff), or using software tools to clean/smooth weights. - **Overlapping vertices**: These cause incorrect weight application—merge or separate them first. - **Bleeding weights**: If a bone affects unrelated parts, use your software’s “clean” tool to restrict weights. - **Uneven areas**: Smooth tools help even out patchy weight distribution for natural results. If issues persist, try a smaller brush on trouble spots or re-paint incrementally instead of all at once.