Direct Graphics does not always display properly under Orobor at least on several TiBooks. This example produces nonaccurate graphics: x=findgen(1000) y=cos(x/5) z=x##y tvscl,z The way the system behaves makes it look like a rendering problem, but neither hardware nor software rendering works properly. I'm playing with Apple's X11, used for awhile by a colleague with good results. In this case Object Graphics crashes IDL and sometimes even X11 with hardware rendering, but appears so far to work well with software rendering. Direct Graphics seems fine and everything does run faster. Any input??