POV-Ray : Newsgroups : povray.binaries.images : Version Lighting and Shading differences Server Time
13 Nov 2024 17:34:00 EST (-0500)
  Version Lighting and Shading differences (Message 1 to 5 of 5)  
From: Woody
Subject: Version Lighting and Shading differences
Date: 22 Oct 2010 22:50:00
Message: <web.4cc24d0b24f285cd1e2f0b2e0@news.povray.org>
Can someone explain what's going on?

I rendered the same scene file 3 ways (Attached)

Upper Left - Using version 3.62.


Lower Left - Using Version 3.7
 beta 39

Lower Right - Using Version 3.7 beta 39 with the "#version 3.62;" line

Is it something in thel gloabl_settings file?

THe most obvious differences are in the 3.7 beta 39, but also both versions of
the 3.62 for the orange color. Rendered using the 3.7 engine it appears alot
closer to yellow.

Any help would be appreciated.

-Jeff


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Attachments:
Download 'upload.png' (217 KB)

Preview of image 'upload.png'
upload.png


 

From: Dave Blandston
Subject: Re: Version Lighting and Shading differences
Date: 23 Oct 2010 06:20:01
Message: <web.4cc2b65a8563d681cb6252d10@news.povray.org>
Check the gamma settings. That might be what's causing the differences.

Regards,
Dave Blandston


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From: Woody
Subject: Re: Version Lighting and Shading differences
Date: 23 Oct 2010 12:30:01
Message: <web.4cc30c268563d68185b675330@news.povray.org>
"Dave Blandston" <nomail@nomail> wrote:
> Check the gamma settings. That might be what's causing the differences.
>
> Regards,
> Dave Blandston

Which INI file is this controlled from?

I can't seem to determine this from the documentation.

-Jeff


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From: Jim Holsenback
Subject: Re: Version Lighting and Shading differences
Date: 23 Oct 2010 14:54:41
Message: <4cc32f71$1@news.povray.org>
On 10/23/2010 01:24 PM, Woody wrote:
> "Dave Blandston" <nomail@nomail> wrote:
>> Check the gamma settings. That might be what's causing the differences.
>>
>> Regards,
>> Dave Blandston
> 
> Which INI file is this controlled from?
> 
> I can't seem to determine this from the documentation.
> 
> -Jeff
> 
All that stuff was mentioned in changes and revision.txt and we're
//fairly// up to date on the wiki ... take a look at:
http://wiki.povray.org/content/Documentation:Tutorial_Section_1#Changes_and_New_Features_Summary
and I'm sure you'll find the relevant topic(s) :-)


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From: clipka
Subject: Re: Version Lighting and Shading differences
Date: 20 Nov 2010 22:09:54
Message: <4ce88d82$1@news.povray.org>
Am 23.10.2010 04:48, schrieb Woody:

> THe most obvious differences are in the 3.7 beta 39, but also both versions of
> the 3.62 for the orange color. Rendered using the 3.7 engine it appears alot
> closer to yellow.

Are you perhaps using PNG image files for the texturing?

In that case, the difference in the orange color is a result of changes 
to gamma handling of input image files. You should be able to get the 
original behaviour by specifying "gamma 1.0" after the input file name:

     image_map { png "my_image.png" gamma 1.0 }

However, The normal behaviour of POV-Ray 3.7 should be more faithful to 
the original image used for the textures.

(Feedback appreciated, even if you have the problem sorted out by now.)


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