Ok, I'll try to repost that into another subforum. Here's another.
In artifact site mission, I shot a tasoth with GC-ZR, which apparently caused the floor beneath the tasoth to get destroyed, and the tasoth fell to the floor below. However, it fell inside the walls and cannot get out and cannot be killed. I suppose this is a bug in definions, and the floor through which it fell should have been indestructible. I guess I'll have to hack the save and/or use debug mode to move or kill it.
Not sure if this is a bug in the original (never seen it happen at least), or whether the destructability of walls etc. has been changed in this mod. I don't recall seeing "falling through" behavior in vanilla TFTD but I may be wrong.
BTW. I wonder why I got mixed crew in artifact site mission at the start of July. Based on alienMissions, I would have expected the chances to be
STR_AQUATOID: 20
STR_GILLMAN: 30
STR_CARCHARODON: 50