From: zyeh@caspian.usc.edu (zhenghao yeh) Subject: Definition of Occlusion Organization: University of Southern California, Los Angeles, CA Lines: 14 Distribution: world NNTP-Posting-Host: caspian.usc.edu Keywords: occlusion Hi! Everyone, I don't clearly understand 'occlusion' in computer graphics. Would you please give me an explanation? BTW, what's the difference between 'occluded surface' and opaque surface? Thanks in advance. Yeh USC