Hi, thought this might be useful info: I recently got frustrated with Glut under Linux in some other code I've been working on and discovered that FLTK has a "Glut emulation mode". This can be enabled by changing all references to <GL/glut.h> to <FL/glut.H> and linking with FLTK rather than Glut. I tried this with Glutmaster and it worked flawlessly. -Damion-