Hi halx, this didn't make it to the mailing list, so I've quoted it below for others. Yep that's how it works ATM, and color() does not survive to rendering. There has been work to properly colourise things, so it is in progress. Perhaps @doug.moen can give an update? halx wrote > The difference() method is painting the cutoff edges by the color of the > removed member if the remaining member is a compound object (two or more > differently colored parts in the module(). So you cannot make a cut-out to > demonstrate/investigate internals of complex geometry. I think it should > be easy to fix. ----- Admin - PM me if you need anything, or if I've done something stupid... Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above. The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ time is running out! -- View this message in context: http://forum.openscad.org/The-very-sad-diffence-bug-tp18308p18309.html Sent from the OpenSCAD mailing list archive at Nabble.com.