/vr/ - Retro Games

>>4204648
It requires some dehacking.
Set up 2 sectors like a donut and a donut hole, and give them the same tag.

In dehacked you need to make a new actor that just shoots like a former human, waits, shoots, waits (a hitscan dummy). Put him in a room separate from the map. Point him at a line with action 46 - GR Doom Open Stay. Give the line the same tag.

When you fire in a map it'll awake the hitscan dummy, he'll shoot the line, the line will trigger the donut sectors like a door, the doors will try to move to 8 below the higher ceiling so they'll be chasing eachother downward. Since they're higher than their current height they'll do it instantly.