How to fix broken in viewport 3D models?

To fix broken 3D models in the viewport, start with three key steps: repair corrupted geometry, update graphics drivers, or reset viewport settings—then isolate issues if problems persist. Corrupted mesh (like non-manifold edges or duplicate faces) can be fixed with built-in tools (e.g., Blender’s “Merge by Distance” or Maya’s “Cleanup”). Outdated GPU drivers often cause glitches—download the latest version from your manufacturer (NVIDIA, AMD, Intel). Resetting viewport preferences clears temporary bugs that disrupt rendering. If problems remain, hide non-essential objects or switch shading modes (e.g., wireframe to textured) to narrow down the cause.