Walls break the game?

NutmegSF​  Could you post a video of the issue, or at least describe it in more detail?

Please also post a dxdiag, for reference.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.