ZModeler3 - Car textures flickering when camera moves

If you can tell the texture itself is changing then that usually means you are missing that texture in your .ytd or the texture in the .ytd doesn't match the same name in Zmod3. If something has no texture gta will start pulling random textures of things around you/your camera which may be what your seeing in your clip but the clip is a bit hard to tell exactly what is happening, however if it missing or named improperly compared to Zmod3 this would explain why it changes when cars go by as gta may be trying to pull textures from the passing vehicle.

This is most likely caused by broken mipmaps, which are smaller versions of the texture that will be displayed from specific angles (anisotrophic filtering) and distances to improve performance and anti-aliasing. You can generate new mipmaps in OpenIV by setting them to 1 and then back to the original (or the largest) number.