[Bf-cycles] Question about Seed

[Julian Hhhhhh]

Thomas: Could you render a 3000 sample Version and compare some
pixel-values by hand? I still believe the result should be identical
(unless the renderer already shoots more photons in noisier areas - don't
know it that's already supported (but you probably do).
Am 22.11.2011 23:34 schrieb "Thomas Dinges" <blender at dingto.org>:

>  Original 1000s http://temp.dingto.org/render_seed/1000.png
> Original 2000s http://temp.dingto.org/render_seed/2000.png
>
> Combined 3000s, with a Weighting of 0.66:
> http://temp.dingto.org/render_seed/3000_combined.png
>
> Am 22.11.2011 23:20, schrieb Jordan Miller:
>
> well the way to test would be to do the 3600 sample render and compare the
> results. you can do a convert to grayscale then Boolean subtract the two
> images, then invert the result to see pixel differences.
>
>  I suspect the 3600 sample image will be superior. should be identical
> render time but require no post processing.
>
>  now I want to see the image in question, too! care to post it?
>
> jordan
>
>
>
> On Nov 22, 2011, at 5:15 PM, Thomas Dinges <blender at dingto.org> wrote:
>
>   Yes, that's what Jordan suggested. :)
> This makes sense and also gives better results.
>
> I hope we will get a better solution though, a good merging system would
> be awesome. :)
>
> Am 22.11.2011 23:11, schrieb Kel M:
>
>
>
> On Tue, Nov 22, 2011 at 4:59 PM, Thomas Dinges <blender at dingto.org> wrote:
>
>> That seems to give better results, right. Still not sure about this.
>>
>> Am 22.11.2011 22:36, schrieb Jordan Miller:
>>  > have you tried merging them weighted ("factor" setting)
>> proportionally to the number of samples?
>> >
>> > jordan
>> >
>> >
>> >
>> >
>> >
>> > On Nov 22, 2011, at 4:19 PM, Thomas Dinges wrote:
>> >
>> >> Hi Brecht,
>> >> I am testing the Seed function atm in the Integrator panel.
>> >>
>> >> Am I right that images, rendered with different seeds can be merged
>> >> together?
>> >> So for example:
>> >> Image_1 has Seed 1 and 1000 Samples
>> >> Image_2 has Seed 5 and 2000 Samples
>> >>
>> >> Do I have 3000 Samples after merging them together?
>> >> I did that in the compositor with the Mix node, factor 0.5 and I used
>> >> OpenEXR renders for it.
>>
>
> If the second image was in the second input, shouldn't you set the Factor
> to 0.66? :)
>
>
>>  >> The combined result was better than the single images, I have the
>> >> impression (more noise free).
>> >>
>> >> Then I rendered another image with 600 samples, and combined it to the
>> >> already combined result. Now I have the impression though that the
>> noise
>> >> became more again, rather than less.
>> >>
>> >> So do I something wrong, or is that not supposed to work the way I use
>> >> it? :)
>> >>
>> >> Best regards,
>> >> Thomas
>> >>
>> >> --
>> >> Thomas Dinges
>> >> Blender Developer, Artist and Musician
>> >>
>> >> www.dingto.org
>> >>
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>>
>> --
>> Thomas Dinges
>> Blender Developer, Artist and Musician
>>
>> www.dingto.org
>>
>> _______________________________________________
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>> http://lists.blender.org/mailman/listinfo/bf-cycles
>>
>
>
>
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>
> --
> Thomas Dinges
> Blender Developer, Artist and Musician
> www.dingto.org
>
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>
> --
> Thomas Dinges
> Blender Developer, Artist and Musician
> www.dingto.org
>
>
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