/vr/ - Retro Games

questions to anons who know something about quake mapping:
I had this crate here that was overlapping with terrain I had selected on the pic, when compiled and in game, the crate was not solid around place where it overlapped, rest of the crate was solid as it should be. it wasnt the case of leaks as I have boxed the map to be sure, and its unique case as my slipgate is also overlaping with some terrain but its solid as it should be. any anons know what could be the issue and why it happens?
I have fixed it by moving the crate to more flat terrain but I am still wondering why its happening.