when i move the chest object with keyboard and hit the cube I rotate it. you will see the chest model wont be rendered on the corners when rotating it near the cube.
use arrow keys 'up'to move forward then when you hit the cube rotate right with right arrow and the background object is displayed over foreground object 'chest' on the corner. http://www.mymrt.net/testCollision/my3DcollisionTest.html
