ZDoom

How check is some sector ceiling/floor moves up/down at this specific game tick?
I want make gibs which act more like actual things under crusher, which means fly out of crusher as "soon" as crusher start crushing it.

I know there are grind actor virtual, but it usually calls when actor already too late to splash out of crusher.

probably your best bet is to have the actor check the sector(s) it's in/near, and then keep track of what it was like last tic and see if it's different on the next one

And what if lift with actor surrounded by another lifts? And that lifts with another lifts.
I know that possibility of this is too low.