I haven't been able to figure out a solution, so I thought I'd post this problem again.... I define my own cylinders with QuadArrays. I also use Sphere objects in my scene. I define a plane (quadarray) and set its transparency to 0.5. The plane cuts through some of the cylinders. Other cylinders are completely behind the plane, others are in front. Spheres are both behind and in front of the plane. PROBLEM: All of my cylinders behind the (0.5) transparency plane can not be seen at all. All spheres behind the transpatency screen **are** visible (with a slight color change, as I want, indicating they are behind the plane.) Why can I see Sphere objects but not my quadarray Shape3D objects???? Is there a way I can define my cylinders to behave like the Sphere objects??? Bob Gray =========================================================================== 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".