POV-Ray : Newsgroups : povray.binaries.images : Area light macro + photons Server Time
7 Nov 2024 19:24:51 EST (-0500)
  Area light macro + photons (Message 1 to 4 of 4)  
From: And
Subject: Area light macro + photons
Date: 13 May 2014 14:15:01
Message: <web.5372603b1e822bcbea0f311c0@news.povray.org>
I rendered a nice picture.


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Preview of image 'refl test3 1h2m56s.png'
refl test3 1h2m56s.png


 

From: jhu
Subject: Re: Area light macro + photons
Date: 13 May 2014 20:00:01
Message: <web.5372b19aaa730876d19b0ec40@news.povray.org>
Needs more anti-aliasing


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From: Cousin Ricky
Subject: Re: Area light macro + photons
Date: 13 May 2014 21:05:00
Message: <web.5372c0aeaa730876192ae5f10@news.povray.org>
"jhu" <nomail@nomail> wrote:
> Needs more anti-aliasing

I don't think that would make a difference.  Due to post-sampling clipping since
POV-Ray 3.6, very bright objects (much brighter than rgb <1, 1, 1>) will have
jagged edges, no matter what the anti-aliasing setting.  Notice how only the
bright object and highlights are jagged; all the other objects have smooth
edges.  The only way I know of to fix this is to render the image at a large
size, then reduce the size in post-processing (using a program such as GIMP or
Photoshop).

There is an advantage to the change: high dynamic range areas of sub-pixel size
won't get lost, giving a more accurate impression of brightness.  The attached
image shows one dramatic example.  Better rendering of star field textures has
also been mentioned.


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From: And
Subject: Re: Area light macro + photons
Date: 14 May 2014 00:05:00
Message: <web.5372eb24aa730876ea0f311c0@news.povray.org>
"Cousin Ricky" <rickysttATyahooDOTcom> wrote:
> I don't think that would make a difference.  Due to post-sampling clipping since
> POV-Ray 3.6, very bright objects (much brighter than rgb <1, 1, 1>) will have
> jagged edges, no matter what the anti-aliasing setting.  Notice how only the
> bright object and highlights are jagged; all the other objects have smooth
> edges.  The only way I know of to fix this is to render the image at a large
> size, then reduce the size in post-processing (using a program such as GIMP or
> Photoshop).

Oh, yes
I rendered this image with +AM2 +A0.02 +R5

So it is. I don't need render it with more aa.


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