Hi, I have a scientific visualisation app (cgui from http://www.bioeng.auckland.ac.nz ) that I have tested on 3 different machines and I have found that the graphics performance is opposite to what I expected. I was wondering if anyone could give me some pointers about how to figure out what might be causing the slowness on 2 of the machines. The machines are: 1. Compaq Presario 2100 series laptop. Athlon XP 2400, 512Mb Ram, Ati Radeon IGP320M. The accelerated features of this graphics chipset are not supported by XFree86. 2. PC with AMD Duron 900 + Matrox GA400 graphics adpator. 3. PC with Athon XP 1800, running Xvnc 3.3.6. Viewed across 100 Mbit ethernet from vncviewer on Windows. The thing that is confusing me is that when viewing a shaded bezier surface the best performance is on machine 3 - using vnc. I would have expected machine 1 at least to have equivalent performance to machine 3 given that the rendering is being done in software in both cases. But it is noticably a lot slower on machine 1, any ideas why that might be? I haven't done any framerate measurements, the "test" I used was to load a human torso model and rotate it with the mouse. Machine 2 was the slowest at this task, so apparently there is no hardware support for shading in the mga driver or the driver doesn't like my hardware. Machine 2 does however run glxgears the fastest. Any suggestions appreciated. g -- Glenn Ramsey <glenn(a)componic.co.nz> 07 8627077 http://www.componic.co.nz