How to fix flickering in fbx 3D models?

To fix flickering in FBX 3D models, address normals, overlapping geometry, render settings, and export consistency. - **Normals**: Correct inverted or inconsistent normals—they define a face’s front; wrong ones cause surface flicker. - **Overlapping geometry**: Remove overlapping faces—they confuse the render engine, leading to flashes. - **Render settings**: Tweak anti-aliasing or depth bias (z-bias) to resolve depth conflicts between close surfaces. - **Export**: Ensure FBX exports include accurate normals and consistent scale—scaling errors worsen flickering. If issues remain, test the FBX in another software (e.g., Blender) to check if the problem is software-specific, helping narrow down fixes.