Ang Great! A couple of tips on the tut (I finally went back and re-read it). Remember all you need to do on the duplicate is change the signs of booleans of the dup glass group and the dup rock. also I don't don't think I'd move the original. make the duplicate and then move IT only IF you want a broken glass rather than a cracked one. If you make a cracked glass and can't see the seam, move the duplicate only slightly. - TJ