Hi Kelvin Thanks a zillion for your reply. You are absolutely right about z-buffer problems. I also had a similar suspicion and tried to adjust my front and back clip distances, viewplatform distance etc. I read some of the tips given in Java3D performance Sutras available on the net. The z-buffer problem is also affecting the "Appearance" of sharp edged geometries in parallel projection. For example, the edges of a gray cube has dark gray mixed with light gray patches in a wavy form. The appearance looks good if I use default clip distances. I dont have any such appearance problems in perspective projection. The ModelClip error, however, appears both in parallel and perspective projections. I am using Win32 OpenGL 1.2.1 version. BTW, I am using Matrox Millenium G200/ G400 AGP card on Samsung 900P+ monitors. I have downloaded the latest drivers. If that does not work, I will give it a shot with 1.2.1_02. Thanks again for the suggestions. I really wish I could get the ModelClip to work because it is such an Extraordinarily useful facility. Doing the same thing manually will take a lot of effort. I am trying to cut a geometry with a modelclip plane and close the opening with a surface cut-plane. My surface cut-plane works very well. Thanks Raj Vaidya, PhD =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
