This is a very poor attempt to do what Matt Fulmer did with OpenCobalt: integrate overlapping Morphic windows with OpenGL. The only advantage is that it doesn't require OpenCobalt. https://www.youtube.com/watch?v=Ctm-Q39nd-k The entire World is being rendered onto an OpenGL texture which is updated with every tick. With the proper scaling , the destop could be repositioned along the z access at any point within the fustrum and still keep the default mouse handling. Add mouse handling from OpenGL itself, and you can have 2D widgets projected onto 3D objects, not to mention 3D widgets fully integrated with the Squeak desktop. Time to revive/revitalize Balloon3D, perhaps? Whatever happened to 3D Morphic? There's obviously a great deal of room for optimization, and of course, the sky is the limit for what could be done in terms of lighting, materials, etc. Using more modern APIs of OpenGL (I'm using immediate mode! (!) and only stuff from the first 6 NeHe tutorials) one could have an awful lot of interesting stuff going on. Lawson