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Date: Wed, 25 Oct 1995 11:46:26 -0700 (PDT)
From: John Gross <[e-mail]>
Subject: Re: Horizontal "scratch" lines in transparent object
To: Donald Drennan <[e-mail]>
Cc: [e-mail]
In-Reply-To: <Pine.3.07.9510242146.A12661-a100000@acme>
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>
> > > Recently I rendered an anim of a glass prism. As I had read in a tutorial
> > > on refraction, I created double sided polygons; I copied the object,
> > > flipped the surface normals and pasted into the original object, then I
> > > merged points.
>
> I was using version 4.0 for SGI, which is, I think, still a beta version.
>
> Should I have merged points?

Merge Points is fine. Make sure that you don't have any polys sharing the
same points and facing the same direction (Use Unify to get rid of them).
It sounds like that is what may be happening.

JG
--
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