floor

hi i have made a room and a door and what not and i have stumbled across a problem. when i load the game on a doom2 runner i have a floor noclipping look like problem when you go out side a map. this also is happening to the cieling as weel can someone tell me what is wrong?

OMG UR MAP FUCKS UP WHEN U NOCLIP OUT OF IT?????? OMG I NEVER KNEW THIS CULD HAPPEN!!!!!!!!111

Did you check for unclosed sectors?

Screenshot please.

how do i do that?

Add -devparm to the command line and press F1.