Hi, can anybody confirm this weird behaviour shown in the attached files? I'm displaying a scene where the spheres have an alpha value of .9f (almost opaque). With this alpha value the depth ordering is not working as shown in the image sequence (all image file names below 10). The same scene with an alpha of 1.0f does not show the behaviour, the depth ordering is fine (see the attached image sequence, all image file names from 10 and above). In the image sequence I'm moving the camera so the red sphere on the bottom should be displayed above the purple sphere. Currently I don't have any short code sequence for demonstration because I have first to extract it from the project. Regards, Jörg