POV-Ray: Newsgroups: povray.general: height_field smooth: Re: height

POV-Ray : Newsgroups : povray.general : height_field smooth : Re: height_field smooth		Server Time 2 Aug 2024 08:14:27 EDT (-0400)

From: Tim Nikias
Date: 11 Dec 2004 02:14:39
Message: <41ba9e5f$1@news.povray.org>

This is a known problem. The "smooth" keyword, especially when resizing the
height_field, may result in unexpected shadow artifacts. One possibility is
to use double_illuminate and/or no_shadow, another is to use an isosurface
or just write a script to calculate the mesh yourself.

IIRC correctly, the problem is due to the calculated normal's and how they
are moved about and scaled when resizing the heightfield, but someone with
more expertise might know the actual, 'correct' bug. ;-)

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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