Sliding doors in vanilla, a short tech demo map

vanilla sliding door demo.zip (doom.wad, e1m1)

Not sure if anyone already made this, but here's a short map i made in these days for testing out this nifty effect.

Works good with chocorenderlimits and boom compatible ports (cl 3), gives some sector raise bug on edge 1.32 and zdoom-compatible ports at the first sliding door (the one that opens in the middle).

If you mean having a bunch of lines close together to activate instant moving sectors, it's been known for a long time, yeah. https://www.doomworld.com/tutorials/fx11.php

see also Requiem Map03: