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320x240 basic scene rendered using +W320 +H240 +SP8 +EP2
Obviously there's something wrong.
This was rendered in Windows XP with a modified beta.31 - but I'm sure I didn't
touch the mosaic preview code. Can someone confirm?
Post a reply to this message
Attachments:
Download 'test.png' (32 KB)
Preview of image 'test.png'
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One important thing I forgot to mention: These artifacts *only* show in the
*file* output (both png and bmp; didn't test others); you don't see them in the
preview display. Which makes it all the worse.
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From: Thomas de Groot
Subject: Re: Mosaic Preview generates borderline artifacts
Date: 28 Mar 2009 11:17:01
Message: <49ce3f6d@news.povray.org>
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No. Did not get those artifacts (png).
Thomas
Post a reply to this message
Attachments:
Download 'BasicScene_test.png' (32 KB)
Preview of image 'BasicScene_test.png'
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"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> No. Did not get those artifacts (png).
Dang. That probably means I need to painstakingly check my version of the code
for any differences to the beta.31 source.
Maybe it's some code from the repository that hasn't been released yet.
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"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> No. Did not get those artifacts (png).
Now that's what I call weird, because I get the artifacts with *all* 3.7 beta
versions I have on both of my computers - Linux and Windows alike, freshly
pulled post-beta.31 code from the repository and old beta.29 (with just the
expiration check killed).
It's an invariant: POV 3.7 beta with mosaic preview enabled gives me those
artifacts in the files.
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"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> No. Did not get those artifacts (png).
>
> Thomas
You rendered with anti-aliasing turned on, right?
Try without. Also make sure you set mosaic preview end size to 2.
During mosaic preview, results from each pass are re-used for the next one.
Likewise, the final pass re-uses all results from the mosaic preview passes if
possible (that is, if anti-aliasing and focal blur are off, and - to keep
implementation simple - the preview was done right down to size 2).
As it seems, the data for all the rightmost blocks gathered during each preview
pass is discarded for some reason (or overwritten with black).
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"clipka" <nomail@nomail> wrote:
> 320x240 basic scene rendered using +W320 +H240 +SP8 +EP2
>
> Obviously there's something wrong.
>
> This was rendered in Windows XP with a modified beta.31 - but I'm sure I didn't
> touch the mosaic preview code. Can someone confirm?
I confirm.
Windows XP sp3, beta 31 from povray.org
-strange-
--
Carlo
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"Carlo C." <nomail@nomail> wrote:
> -strange-
Well, not too strange once you know what's going on. Turned out it was an easy
one - I just submitted a fix...
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On Sat, 28 Mar 2009 09:30:06 EDT, "clipka" <nomail@nomail> wrote:
>Can someone confirm?
I confirm it on Vista. The greater the value of +SP the more artefacts.
--
Regards
Stephen
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From: Thomas de Groot
Subject: Re: Mosaic Preview generates borderline artifacts
Date: 29 Mar 2009 03:29:05
Message: <49cf2341@news.povray.org>
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"clipka" <nomail@nomail> schreef in bericht
news:web.49ce56dc4c55df9722390e420@news.povray.org...
> You rendered with anti-aliasing turned on, right?
>
> Try without. Also make sure you set mosaic preview end size to 2.
>
Yep. Confirmed. AA was on indeed.
Thomas
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