Just to let you all know, in case you don't already, SciTech has released sources to their MGL (OpenGL tools.) Get it here: http://www.scitechsoft.com/dp_mgl.html Let's port this thing to linux! ;) -- Robert Dale http://www.nb.net/~rob Augustine's Second Law of Socioscience: For every scientific action, there is an equal and opposite social reaction. .