Floor raise..

[MancubusBruiser1988]

How do I make a floor raise that is triggered by killing a monster? So you kill a spider mastermind then from above a floor raises on a fence with monsters on it...

[scifista42]

If you're mapping for ZDoom and in Hexen format or in UDMF, simply set the SpiderMastermind's "Action" to "Floor Raise <something>" with respective "Arguments" to affect a specifically tagged sector, move by a specific speed, etc. The action will be automatically performed upon killing the monster.