POV-Ray : Newsgroups : moray.win : OpenGL, Videocards and Leveller : OpenGL, Videocards and Leveller Server Time
28 Jul 2024 10:22:44 EDT (-0400)
  OpenGL, Videocards and Leveller  
From: Thomas de Groot
Date: 24 Feb 2001 03:25:55
Message: <3a977013@news.povray.org>
Hi all!
I am not sure if this message is correctly posted in this particular ng.
However, as Moray3.3 now supports OpenGL, and as I suppose that many Moray
users also use Leveller, this might be of interest here.
The problem is this:
The 3D view of Leveller always worked fine until I used it on a new PC with
a NVidia GeForce2 video card. This now shows ugly jaggies whenever I use a
visible water level .
I discussed the problem with Ray Gardener, the maker of Leveller, and he
told me it "looks like a classic case of low OpenGL Z-buffer precision".
After some extra trials, he came with an intriguing answer where the video
card might be involved:
Quote:
"Hmm... the nVidia card is interesting. My system where I work at EA has an
nVidia GeForce and it exhibits some unusual intermittent problems with
Leveller. I don't know if it's the video card, but the problems don't occur
on other systems, and they're also rendering related. While flying, the
sampling rate can suddenly change to 64 x 64. I suspect the render settings
are getting corrupted, and in your case it's the backplace distance instead
of the sampling rate (same root problem, but different symptoms)."

Does anyone have the same experiences?
Does anyone have a bright idea about this?
Ray Gardener and I would be extremely interested indeed!

Sincere excuses for the somewhat lengthy mail, but difficult to shorten...

Thanks!

Thomas


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