i've seen quite a number of bottles/cans on 1/2 acre that can be punted about by weapons/melee. my question is, with props like the bottle which hasn't got inherent physics, what special things did you have to do with it to get it to work? for me, whenever i use something that is dynamic but not physics checked in the model viewer, the game will occasionally crash during a collision. (including bottles) thanks edit: ok... seems the problem isn't the props at all, but some displacement brushes. seems that if a demoman's grenades or stickies pass near/over some brushes the game locks up (i copy pasted them to a new map to test this, and it indeed crashed). what's up with that? i'm gonna destroy/remake the displacement, but what could've caused this in teh 1st place?