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Some of you might have seen my current WIP, the image currently entitled
"Windows". I make excessive use of radiosity in that image to get a soft,
realistic lighting.
Anyways, I've fiddled with some of the images in Paint Shop Pro and noticed
that some higher contrast does a lot for the image. I'm a sucker for doing
things right inside POV-Ray, so does anyone have ideas or techniques on how
to raise the contrast inside POV-Ray?
My main trouble lies within the radiosity itself, though smooth enough, I'd
like darker shadows, but simply lowering brightness will also turn the
bright areas darker.
Anyways, suggestions or techniques (using the current "standard" POV-Ray,
not some patch-version) are welcome. :-)
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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Tim Nikias wrote:
> Anyways, suggestions or techniques (using the current "standard" POV-Ray,
> not some patch-version) are welcome. :-)
POV-Ray 3.7 may include such a feature eventually. But detils are still to
be determined.
Thorsten
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Your WIP is fine, but I would raise assumed_gamma above 1.
Personally, after 5 years of using a gammavalue of 1 I now use 2.2 together
with a brightness of 2.5.
In connection with my flat panel monitors this is a convincing solution for
contrast problems I had too.
Regards
Norbert Kern
"Tim Nikias" <JUSTTHELOWERCASE:timISNOTnikias(at)gmx.netWARE> schrieb im
Newsbeitrag news:4314fcd2@news.povray.org...
> Some of you might have seen my current WIP, the image currently entitled
> "Windows". I make excessive use of radiosity in that image to get a soft,
> realistic lighting.
>
> Anyways, I've fiddled with some of the images in Paint Shop Pro and
> noticed
> that some higher contrast does a lot for the image. I'm a sucker for doing
> things right inside POV-Ray, so does anyone have ideas or techniques on
> how
> to raise the contrast inside POV-Ray?
>
> My main trouble lies within the radiosity itself, though smooth enough,
> I'd
> like darker shadows, but simply lowering brightness will also turn the
> bright areas darker.
>
> Anyways, suggestions or techniques (using the current "standard" POV-Ray,
> not some patch-version) are welcome. :-)
>
> Regards,
> Tim
>
> --
> "Tim Nikias v2.0"
> Homepage: <http://www.nolights.de>
>
>
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Tim Nikias <JUSTTHELOWERCASE:timISNOTnikias(at)gmx.netWARE> wrote:
> Anyways, I've fiddled with some of the images in Paint Shop Pro and noticed
> that some higher contrast does a lot for the image. I'm a sucker for doing
> things right inside POV-Ray, so does anyone have ideas or techniques on how
> to raise the contrast inside POV-Ray?
Traditionally people have adjusted contrast as a post-processing step
with a third-party image manipulation program.
However, I have always wondered if it couldn't be possible to do it
from within povray itself by adjustin assumed_gamma and the brightness
of light sources...
--
- Warp
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scenes/textures/pigments/transmitfx.pov ?
Rune
--
3D images and anims, include files, tutorials and more:
rune|vision: http://runevision.com
POV-Ray Ring: http://webring.povray.co.uk
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Tim Nikias wrote:
>
> My main trouble lies within the radiosity itself, though smooth enough, I'd
> like darker shadows, but simply lowering brightness will also turn the
> bright areas darker.
raise light source brightness and adjust material properties accordingly
and you will get higher contrast radiosity results. A washed-out
appearance is often a result of using unrealistically low lighting levels.
> Anyways, suggestions or techniques (using the current "standard" POV-Ray,
> not some patch-version) are welcome. :-)
:-)
Obviously you can do that with MegaPOV's post processing patch. For
simple brightness/contrast adjustments you can also use the tone mapping
patch (see macro Brightness_Contrast() in tone_mapping.inc - much faster
than with the post processing feature).
Note it is of course often more convenient to render to a plain, not
adjusted image and do the post processing afterwards.
--
Christoph Hormann
http://www.tu-bs.de/~y0013390/
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> POV-Ray 3.7 may include such a feature eventually. But detils are still
to
> be determined.
Looking forward to it. :-)
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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> Personally, after 5 years of using a gammavalue of 1 I now use 2.2
together
> with a brightness of 2.5.
Might be worth a shot, at least for a quick solution. Thanks for the tip.
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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> Traditionally people have adjusted contrast as a post-processing step
> with a third-party image manipulation program.
Yeah, I know, but I like it if I can set an image in a window that it
doesn't require post-processing to look like I want it to. :-)
> However, I have always wondered if it couldn't be possible to do it
> from within povray itself by adjustin assumed_gamma and the brightness
> of light sources...
That's what others suggested as well. I'll have to look into that.
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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> scenes/textures/pigments/transmitfx.pov ?
Hm. Precise answer. I'll have to find out if I does what I want. Thanks
though! :-)
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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