Yeah, I did. Simply copied and pasted my stained glass model (which was part of another scene) into a brand new scene. Added a cube for a wall and reshaped it to make a wall, placed them together, selected both, selected boolean operations, and selected "Cube minus stained glass". All I get are the "rendering failed" messages, and it looks like when I can see something it combines them rather than subtracts the stained glass from the wall... Weird... but I can do simple booleans like combining a cube and sphere and doing the intersection/subtraction stuff... though I still get errors then too. Carrara is making me a little angry here.... 8^) Headgamer