Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!sdd.hp.com!hplabs!hpfcso!hpfcdc!koren
From: koren@hpfcdc.HP.COM (Steve Koren)
Newsgroups: comp.sys.amiga
Subject: Re: Imagine's CSG Spheres
Message-ID: <5500043@hpfcdc.HP.COM>
Date: 4 Jan 91 04:46:34 GMT
References: <2062@beguine.UUCP>
Organization: HP Fort Collins, Co.
Lines: 17

/ hpfcdc:comp.sys.amiga / Viet.Ho@samba.acs.unc.edu (Viet Ho) / 12:57 am  Dec 31, 1990 /

I did some quick rendering tests on Imagine today and noticed
the edges of the CSG spheres are *FACETED*  Now I've double checked
to make sure these are CSG spheres in the Stage editor.  There's
only one sphere in the scene.   Is Imagine doing polygon mesh
approximation on their CSG spheres for the render process?  
Why would they do such a foolish thing?   

I use 640X400 in all of my renderings and the edges are most
noticable along the darker side of the sphere.   This
artifact came up in the early TurboSilver renderings, but I
didn't paid much attention to them then.

-Viet
 Viet.Ho@samba.acs.unc.edu 
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