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From: alphaQuad
Subject: planetarium
Date: 27 Mar 2008 00:35:01
Message: <web.47eb310bda135a0980c7eb9a0@news.povray.org>
why do maps get so washed out in pov?

the next image will show true MW colors


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From: alphaQuad
Subject: Re: planetarium
Date: 27 Mar 2008 00:40:00
Message: <web.47eb32b06d310c1480c7eb9a0@news.povray.org>
true MW colors


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From: Thomas de Groot
Subject: Re: planetarium
Date: 27 Mar 2008 02:45:45
Message: <47eb50a9$1@news.povray.org>
"alphaQuad" <alp### [at] earthlinknet> schreef in bericht 
news:web.47eb310bda135a0980c7eb9a0@news.povray.org...
> why do maps get so washed out in pov?
>

Try a higher diffuse value (default is 6) in the finish block. I typically 
and systematically use diffuse 0.8 every time I use image maps.

Thomas


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From: Thomas de Groot
Subject: Re: planetarium
Date: 27 Mar 2008 02:57:27
Message: <47eb5367$1@news.povray.org>
"Thomas de Groot" <t.d### [at] internlDOTnet> schreef in bericht 
news:47eb50a9$1@news.povray.org...
>
> ....(default is 6) ....

Default is 0.6 of course!

Thomas


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From: Warp
Subject: Re: planetarium
Date: 27 Mar 2008 04:59:13
Message: <47eb6ff1@news.povray.org>
alphaQuad wrote:
> why do maps get so washed out in pov?

  It may be related to assumed_gamma.


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From: Kyle
Subject: Re: planetarium
Date: 27 Mar 2008 07:03:23
Message: <933nu39qqq4g0kraqlib6i1sfpnj9qjqr2@4ax.com>
I have had similar issues in the past, and it is related to gamma correction, as Warp
mentioned.

Read through this thread:

http://news.povray.org/povray.general/thread/%3Cvp9bd1p330mntk3k9dhlfch4csv2215j12%404ax.com%3E/

Then get the macro here:

http://news.povray.org/povray.text.scene-files/thread/%3Ce9e0e19dor0jq2boh8l45o73e8ulm1upjq%404ax.com%3E/


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From: scott
Subject: Re: planetarium
Date: 28 Mar 2008 06:17:00
Message: <47ecd3ac$1@news.povray.org>
> why do maps get so washed out in pov?

As others have said, it is due to the gamma.  Basically, POV works 
internally in linear colour space, then applies gamma correction to the 
output before you see it.  The problem is that POV treats image maps as 
being in linear colour space, but usually they are not.

To fix this, you need to adjust the gamma of your input image map to 
compensate in an image editor, usually by a factor of 2.4 (can be either 2.4 
or 1/2.4 depending on your program, but you must make the image look 
darker).

It would be really helpful if POV had a gamma keyword inside the image map 
function, where you could specify if the input image has a non-unity gamma 
correction already applied, then POV could undo that before feeding it into 
the rendering algorithm.


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From: alphaQuad
Subject: Re: planetarium
Date: 30 Mar 2008 18:25:00
Message: <web.47f020406d310c148cbbb6920@news.povray.org>
read thru them, but conclude that my radiosity file is the color preservation
that works here. nothing else I tried did as well. gamma is at 1.0 as
recommended.





Tiangulation.inc is updated. If you've adopted, replace in include dir.

Had to find patience due to frustration this took more than 3 days.

At least this is the way I'd do it. 1.5 minute render with true color by
radiosity.

Megapov needed for date function. So set your timezone (bkwards) in
megatime.inc.
6 = central. Timezone feature and star-search-set-cam-view still to do.

Hope someone can fix the atmosphere; it is total white now. (planets.inc)

Needs http://home.earthlink.net/~gamma-quadrant/pl-maps.zip
(small) 2.7 meg


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From: alphaQuad
Subject: Re: planetarium
Date: 30 Mar 2008 18:55:01
Message: <web.47f0277d6d310c14850dfab90@news.povray.org>
with nice shiny spacecraft you'd want the back stars, didnt think of that. was
thinking of performance.

ok next, the zip and a chance for others to run iwth it..

May I Suggest cool navigation features and a spikey star object rather than
spheres, make features.


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From: alphaQuad
Subject: Re: planetarium
Date: 30 Mar 2008 18:55:02
Message: <web.47f027e96d310c14850dfab90@news.povray.org>
Hope someone can fix the atmosphere; it is total white now. (planets.inc)

Needs http://home.earthlink.net/~gamma-quadrant/pl-maps.zip
(small) 2.7 meg


(report bugs and corrections)


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