Strange Problem With Faces On Meshes

I am having a problem in my viewport while editing, and while the game is running. The faces are appearing black, and some are disappearing. I have no idea why this is happening. It appears to happen only when very far away from the camera. If anybody knows why, please help. Thanks.[ATTACH=CONFIG]391517[/ATTACH][ATTACH=CONFIG]391518[/ATTACH][ATTACH=CONFIG]391519[/ATTACH]

Have you try looking at your camera’s clipping distance in the properties menu? I have no idea if that’s the cause or not

I see something similar when I switch to orthographic view. Half of the faces are flipped and really strange patterns appear :smiley:

What is your graphic card?