12:Door_Raise (tag, speed, delay, lighttag)
- tag: Tag of affected sector
- speed: How quickly the door moves
- delay: Tics until door closes
- lighttag: Tag of sector to perform a gradual lighting effect in
Raises the ceiling of all affected sectors to four units below the lowest surrounding ceiling. After the door is opened, it will be closed again after delay tics. If tag is 0, then the sector on the line's back side is used.
If lighttag is non-zero a gradual lighting effect is done in the tagged sectors. The light is gradually changed between the darkest neighboring sector when the door is fully closed and the brightest neighboring sector when the door is fully open.