The Quadroom - concept and COOLD2.MAP by Felix Zwingenberger 
             - Rebuilt at The QuakeLab 

The QuakeLab - http://www.in2nett.com/stevefu/QuakeLab

TEXTURES:

        Your choice. No set standards.

ENTITIES:

        func_door

WHAT TO DO:

        Simplest Approach:

        Make 3 square brushes and fit them together so they form the corner
        of a room. Then copy this collection and rotate/mirror as necessary
        to produce four corners. Designate each triple a func_door all in one
        shot. Set their angles so that they will move off in diagonally op-
        posite directions. Fit the four sets together; when the doors are
        activated, they will move apart from this closed position into a posi-
        tion similar to the one in the picture. Compile and test. You will
        notice that two of the four sets do not appear to move correctly.
        Remember where these two sets are. Go back to the editor. Set the lip
        of those two doors to a negative number roughly equal to the distance
        traveled by one of the functioning doors. This should fix it so that
        it all works perfectly. It might take a little trial and error.

OPTIONS:

        The MAP file has a somewhat more stylized door - blank non-func_door
        brushes have been assembled off to the side and just need to be
        designated func_doors. Try making other interlocking shapes to
        achieve an interesting look. Adjust the speed and sounds to your
        liking. All other func_door options should be considered too - keys,
        killtarget, dmg, etc.