Ceiling_RaiseToNearest
From ZDoom Wiki
252:Ceiling_RaiseToNearest (tag, speed)
tag: Tag of affected sector speed: How quickly the ceiling moves
Usage
Raises a ceiling to the height of the nearest surrounding ceiling which is higher than its current position. If there is no higher ceiling, nothing happens. If tag is 0, then the sector on the line's back side is used.
Examples
As the ceiling specials are fairly trivial, examples of every one can be found in the example wad, Squash. This wad runs on Map01 of Doom2.

