With the recent monthly "Maze" challenge, I dug out a maze that I started working on in Blender back last winter. I had been using BJS 1.14 and here is the basic maze: Maze BJS 1.14 Now as I was trying to stay up to date, I upgraded to BJS 2.2 - and here is that same maze: Maze BJS 2.2 Walk forward then move the camera to the right with the arrow keys or strike awall with a glancing blow in some way. In the first case it looks like the camera bounces off the wall, in the second case, the wall bounces of the camera (and it looks ugly ) Both scenes use the same simple basic javascript for displaying the scene and the same babylon file for lights, camera and geometry Only difference is the version of BJS. Thoughts welcome. cheers, gryff