Bluetone, You got it. I made two Xmas ornaments each with the same trans map (A jagged edge black on one side). Then I just inverted (black to white)the trans map on one of the ornaments to change it into the second piece. Actually each Xmas ball itself consists of two balls nested together. This is how you get the inside and outside shaders different. Hope that explains it. If not I'll work up a screen shot.