[farshizzo]

You can enabled viewpoint collision detection by using the following code:

viz.collision(1)

If you don't want the viewpoint to collide with the blueglass, then add the following line as well:

blueglass.disable(viz.INTERSECTION)

Also, I noticed that you set the eyeheight to 10000 in the script stage settings. You should set it to a smaller value like 1.8.