Hi, I'm trying to get the payload to drop inside the empty dump truck model at the end of my map but it just sits on the top of it like there's a invisible wall there. I, as a player, can step inside of it or another bin I make into a model. Being not that familiar with the way models work in terms of geometry after they are created, I didn't know it if was the Valve dump truck model or not- so I built a new dump truck model from scratch. The same issue occurs with my new model - cart sits on top of the truck. The truck (func_trian) is a part of the finale - gold cart pushed onto ramp - gold cart falls - or supposed to fall - inside the truck and the truck pulls away with the cart ending the map. It looks pretty fun when you see it. Is there some way you can make the models bin (on the truck) hollow? Or Am I forced to make a truck body as the model and then the bin as a brush and convert it into an entity so that it follows the truck dragging the cart along with it?