Just to add to the information base: I have a new notebook with an Intel 5500 graphics card running Windows 10. I found the same problem displaying difference() in render mode. Forcing GoldFeather did the trick. -- View this message in context: http://forum.openscad.org/Intel-HD-4000-Graphics-tp3951p14087.html Sent from the OpenSCAD mailing list archive at Nabble.com.