<span style>As long as Ble</span><span style></span><span style>nder internal compositor works <span></span>right in linear, </span><span style>I think</span><span style> this is just a matter for those who</span><span style> need</span><span style> to compose outside.</span><div>
In real life, composing over black is rare. We are used to compose over other images or color gradients.<div>If the behaviour of the option is correct, as it seams to me, I agree the default value should be ON.</div><div>
<br></div><div><br><br>Em quarta-feira, 12 de dezembro de 2012, Brecht Van Lommel escreveu:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Right, if you composite it over a black it will be correct result with<br>
the option off, for anything else it's a matter of which result looks<br>
less wrong. In this case having the option on looks better. Maybe<br>
that's true in most cases, then we should change the default.<br>
<br>
Brecht.<br>
<br>
On Wed, Dec 12, 2012 at 4:27 PM, Adriano Oliveira<br>
<<a href="javascript:;" onclick="_e(event, 'cvml', 'adriano.ufrb@gmail.com')">adriano.ufrb@gmail.com</a>> wrote:<br>
> See exemple atached:<br>
><br>
> Render with transparency and saved as TIF 16bits RGBA.<br>
> Composed in Photoshop over a red BG.<br>
><br>
> Adriano A. Oliveira<br>
><br>
><br>
> 2012/12/12 Brecht Van Lommel <<a href="javascript:;" onclick="_e(event, 'cvml', 'brechtvanlommel@pandora.be')">brechtvanlommel@pandora.be</a>><br>
>><br>
>> Hi,<br>
>><br>
>> As far as I know, the new color management changes in 2.64 should not<br>
>> introduce any extra fringes compared to before. If that's the case it<br>
>> would be interesting to understand why.<br>
>><br>
>> This option is definitely a color management option though, and<br>
>> affects compositing as well, I don't think it's correct to place it in<br>
>> the Film panel. The exposure option in the film panel will be removed<br>
>> eventually, it's a separation option but it should really be using the<br>
>> color management settings instead. Maybe it should be there anyway,<br>
>> but ideally we could find a better way to communicate things rather<br>
>> than duplicating the option, or maybe the default value should be<br>
>> changed.<br>
>><br>
>> In any case, the unpremultiply option is something that should be<br>
>> avoided when possible, there is no right way to use it, depends a bit<br>
>> on the image what looks best, but the result will be subtly wrong<br>
>> either way. Ideally you should never do color space conversion on an<br>
>> image that has an alpha channel, which means working in linear float<br>
>> color space and only doing the color space conversion at the very end<br>
>> when everything is composited together. Though it's not always<br>
>> possible to set up an entirely correct color pipeline with external<br>
>> tools involved.<br>
>><br>
>> Brecht.<br>
>><br>
>> On Wed, Dec 12, 2012 at 3:34 PM, Adriano Oliveira<br>
>> <<a href="javascript:;" onclick="_e(event, 'cvml', 'adriano.ufrb@gmail.com')">adriano.ufrb@gmail.com</a>> wrote:<br>
>> > Since 2.64 I've problems with transparency finges when editing render<br>
>> > outside Blender.<br>
>> > Last week I discover the "Color unpremultiply" option and every thing is<br>
>> > fine again.<br>
>> ><br>
>> > I supose that many others like me are having hard times dealing with<br>
>> > premultiplied fringes due to new Color Management been so far from<br>
>> > render<br>
>> > options.<br>
>> ><br>
>> > My proposal is to merge Color Management in the FILM slider at Render<br>
>> > Options.<br>
>> > At least, "Color unpremultiply" option should be near TRANSPARENCY<br>
>> > option,<br>
>> > even if it is repeated in Color Management, like Exposure seams to be.<br>
>> ><br>
>> > Adriano A. Oliveira<br>
>> ><br>
>> > _______________________________________________<br>
>> > Bf-cycles mailing list<br>
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>> ><br>
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><br>
><br>
><br>
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><br>
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