Here's some information about wall tags and what they do.
Walls tagged [1,0]
A wall with a Hi-Tag of 1 is excluded from all types of lighting effects (its shade is forced to remain constant).
Walls tagged [0,Channel]
Any wall with a DOORTILE
texture and a Channel Lo-Tag can trigger an effect when operated. Link the Channel value of the DOORTILE
texture to an Activator (or ActivatorLocked/Masterswitch). When the
player presses against the wall, the Activator (or
ActivatorLocked/Masterswitch) will activate.
A DOORTILE
texture is any texture with the name DOORTILE
appended to it : #150 to #159, #395, #447 to #449, #717, #781, #1102, #1144, #1169, #1178, #1179, #4391.
Walls tagged [0,SoundToPlay]
Any wall with the MIRROR
texture will play SoundToPlay when the mirror is pressed on.