Have you tried to rotate the view? There's a plane hanging over the red and yellow boxes and unless you move the camera you won't realize about it's presence in the scene (regardless of the ColorMask).
I'm attaching a couple of screenshots related to what I get with and without the color mask applied to the plane after having rotated the camera a little bit. Cheers, Alessandro ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=64771#64771 Attachments: http://forum.openscenegraph.org//files/osgviewer_2015_08_14_15_43_16_67_211.png http://forum.openscenegraph.org//files/osgviewer_2015_08_14_15_42_16_14_317.png _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

