Door_Animated

From ZDoom Wiki

14:Door_Animated (tag, speed, delay)

tag: Tag of affected sector 
speed: How quickly the door opens 
delay: Tics until door closes 

Opens the affected sector like a door but instead of raising the ceiling visibly it plays a texture animation on the front sides of the door sector. There are a few limitations to observe:

The sector must be set up like a normal door, that is, its ceiling height should be equal to its floor height.

The texture to be used must be defined in the ANIMDEFS lump.

The door sector may only have 2 sides which face another sector.

Those 2 sides must have the same texture