hi guys have put the transparency issue to one side for the moment, as i'm trying to get an image onto the cd surface using the layered shader node the diffraction effect works fine with just the one shader (pic 1), but when i add the picture - it comes in distorted around the polar axis (pic 2) when i use planar mapping on the y axis, the photo looks fine, but i lose the radial effect on the diffraction!!! anyone got any answers to this one? cheers, tony (pix to follow)