POV-Ray : Newsgroups : povray.bugreports : bump maps inverted in spherical warp : bump maps inverted in spherical warp Server Time
25 Feb 2024 07:52:12 EST (-0500)
  bump maps inverted in spherical warp  
From: pkoning
Date: 3 Aug 2021 16:25:00
Message: <web.6109a481dc4077061e101ef1b9aee0ac@news.povray.org>
I'm using a normal with a bump map, wrapped around a sphere using
warp{spherical}.  It looks normal in the northern hemisphere, but the bumps are
changed to depressions in the southern.
I've reproduced this on 3.8.0 alpha on Linux, as well as both 3.7 and 3.8 beta
on Macintosh.  Attached is a scene file that reproduces it (bumpmap.pov), along
with the two
bump map images it uses and the resulting image.  The "equator" on the image is
3 rows from the top, so you can see the top 3 rows are correct and the ones
below that are inverted.  (Light is above the camera.)

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