#6 and #7 If you have P5 you can do part of this with Nodes in the material room. What is needed is the angle between the Normal and the global Y axis. From **Y**.**N** = |Y||N|cos(g), we want g (but have to settle for just cos(g)). Y = (0, 1, 0) length 1 N = (x, y, z) length 1 giving y = cos(g)

Which is equivalent to the N and component nodes in the picture.