Why is atlases 3D model so broken?

A 3D atlas model often seems "broken" due to incomplete data, mesh topology errors, or software compatibility issues. Incomplete geographic/anatomical data can create gaps, while poor mesh topology (like holes or overlaps) leads to visual glitches. Compatibility problems with your viewing tool may also distort the model’s display. If you’re using a downloaded 3D atlas, try updating your viewing software or re-exporting the model in a common format (e.g., OBJ) to resolve minor issues.