I'm trying to create a room with doorways and walls and have it behave as you'd expect. I have a separate very simple physics model. It looks great in the preview window: the yellow collision areas are right where they should be. When I upload it, SL seems not to use this physics model, but to create its own that envelops the object. Since it's a room, this means it makes a big cube you can't enter.
I attach pictures of the room (in SL) and the physics model (in Blender).
The room is in two parts-- floor and walls. The floor part is OK.
The physics model shown is just planes, but I've tried cubes and they don't work either. When I had the walls and floors together, same thing.
Is there any way to tell SL to really, really use the physics model I provide?