So I have tried about 4 days now, to get this work, and had no luck, a friend of mine, tried to help me aswel, but it didnt solve my problem. I tried everything, and I really want some help. I am pretty new to Blender, but wanted to try anyways, because, I have to start somewhere :) I had an idea of Building a small store for myself, and wanted an intrance like a Tunnel, so i builded a cube, and made 1 hole in it. Now my Problem is, I need to make the physics, and cant figure out how. I cant find any tutorials for Precise MY problem, and thats why I descided to ask here! When I made Physics, and uploaded them, I either could walk through the "Walls" , or just walk Diagonal through the "Room" or i didnt even come in. What all isnt what I want. I just want a Cube with a hole, what i can walk into, without going through the walls! Hope someone wants to help me out. -And remember I am a Newbie :) Sincerly Yas