POV-Ray : Newsgroups : povray.general : heightfields, 16bit images and isosurfaces : Re: heightfields, 16bit images and isosurfaces Server Time
4 Aug 2024 10:23:42 EDT (-0400)
  Re: heightfields, 16bit images and isosurfaces  
From: Christoph Hormann
Date: 8 Jun 2003 03:52:40
Message: <3EE2EB70.A5CC1158@gmx.de>
Lutz-Peter Hooge wrote:
> 
> [...]
> 
> -Is there a version of POV-Ray that supports more than 8bit/channel
> in pigments, so that it is possible to make an iso-heightfield from
> an 16bit grayscale image? (function{pigment{image_map{...}}})
> I tried MLPov with an hdr image (converted with HCRedit), but still
> the result didn't look as smooth as the 16bit PNG heightfield.
> Maybe MLPov converts it back to 8bit when it is used inside a function?

The hdr format is not a good idea for heightfields at all.  In official
POV you can currently only use ascii pgm for this purpose, next MegaPOV
will also support 16 bit binary pgm.

You can of course always use the trick of two separate image maps for
HSB/LSB.

Christoph

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