Btw, we looked a bit into it and there's a chance this might be hardware related (The weird lighting one specifically). Have you updated your gpu drivers recently? If so, we'd appreciate if you can give us your dxdiag file so we can take a look into your hardware specs and check if this bug is related to that. To get the dxdiag file, just press Windows key + S, then type in 'dxdiag', click "Save All Information" then post the file on a reply hjere, thanks!
The walls somehow allowing you to shoot might be related to the blast doors, we're still looking into it