I noticed that several people here have remarked that adjusting the contrast
in pov images, especially ones using Radiosity, can have some dramatic
results, usually looks much better. Here are some links to images I've done
in which I've used auto contrast in Photoshop to improve them, the imprved
images end in CON, what do you think of the changes? Should I make them
perminent?

http://www.geocities.com/~thomaslake/Temp/Ball_Maze.jpg
http://www.geocities.com/~thomaslake/Temp/Ball_Maze_CON.jpg

http://www.geocities.com/~thomaslake/Temp/chair_rad.jpg
http://www.geocities.com/~thomaslake/Temp/chair_rad_CON.jpg

http://www.geocities.com/~thomaslake/Temp/house_garage_5.jpg
http://www.geocities.com/~thomaslake/Temp/house_garage_5_CON.jpg

http://www.geocities.com/~thomaslake/Temp/Radiosity.jpg
http://www.geocities.com/~thomaslake/Temp/Radiosity_CON.jpg

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Wow!  Those contrast adjusted pictures are significantly better.  Is there
way to adjust the scene or renderer from within povray to produce the same
effect without the need for post processing?  I always thought many povray
renders came out looking a little gray.  This reminds me of dearmads post:

http://news.povray.org/povray.binaries.images/21294

Could povray's contrast be in need of some adjustment overall?  Not just in
radiosity?
--



Skip

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Skip Talbot wrote:
>
> Could povray's contrast be in need of some adjustment overall?
> Not just in radiosity?

This highly scene specific adjustment and the best tool for
it is an interactive image editor which is much more useful
than any automatic guessing option in povray. 


_____________
Kari Kivisalo

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> This highly scene specific adjustment and the best tool for
> it is an interactive image editor which is much more useful
> than any automatic guessing option in povray.

I found a scene in the POV-Ray 3.5 Beta demo scenes in
scenes/textures/pigments called transmitfx.pov that shows the use of a disc
as filter to get some effects. One disc makes a higher contrast. If the disc
is near the camera it can affect the whole scene. But I think it has to be
adjusted to every scene.

Just my two eurocents,

Bonsai

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Thomas Lake wrote:

> I noticed that several people here have remarked that adjusting the contrast
> in pov images, especially ones using Radiosity, can have some dramatic
> results, usually looks much better. Here are some links to images I've done
> in which I've used auto contrast in Photoshop to improve them, the imprved
> images end in CON, what do you think of the changes? Should I make them
> perminent?
> 
> http://www.geocities.com/~thomaslake/Temp/Ball_Maze.jpg
> http://www.geocities.com/~thomaslake/Temp/Ball_Maze_CON.jpg


The "contrasted" version looks a bit too bright.  In this case, I'm not 
sure it's a good idea as it brings out artefacts in the focal blur - 
especially on the nearest ball.

> http://www.geocities.com/~thomaslake/Temp/chair_rad.jpg
> http://www.geocities.com/~thomaslake/Temp/chair_rad_CON.jpg


Nice.

> http://www.geocities.com/~thomaslake/Temp/house_garage_5.jpg
> http://www.geocities.com/~thomaslake/Temp/house_garage_5_CON.jpg


Subtle, but better.

> http://www.geocities.com/~thomaslake/Temp/Radiosity.jpg
> http://www.geocities.com/~thomaslake/Temp/Radiosity_CON.jpg


Definitely!

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