This is a known bug with the deep recolor node, when you have an alpha value of zero and a non zero value in the color. The incoming image always gets unpremulted before being multiplied again by the deep opacity, but in this case this results in an infinite value. Adding into the alpha like Ella suggested is a work around for now. I have a bug report for it but I'm not in the office right now if you need the number. On May 17, 2012 4:05 PM, "Nitant Karnik" <[email protected]> wrote:
> Hey Ella, > > Thanks so much, that totally worked. I used a DeepExpression to subtract > the 'deep.back' value by .75, which turned out to be the sweet spot in this > instance. Do you know what causes this? It seems like the deep.front and > deep.back values are clipping too tightly. > > Thanks again! > Nitant > > > On Thu, May 17, 2012 at 1:04 PM, ella boliver <[email protected]>wrote: > >> Nitant, >> >> Blothy artifacts sound different than the errors I've seen, but sometimes >> lifting the black point of deeps to .00001 got rid of weird artifacting for >> me. >> >> Good luck! >> >> Ella >> >> On Thu, May 17, 2012 at 3:49 PM, Nitant Karnik <[email protected]> wrote: >> >>> Hi, >>> >>> [Nuke 6.3 v7] >>> >>> I'm working with deep passes (.vrst) and exr beauty passes from V-Ray in >>> nuke and I'm finding that when I use a DeepRecolor node to combine the two, >>> the beauty inherits some blotchy artifacts that are present in the rgb of >>> the vrst pass. I also noticed that when I use the DeepHoldout node, >>> element A is cutting into element B with the same blotchy artifacts as well >>> as inaccurate edges. The elements in the scene are motion blur since they >>> are moving very fast. >>> >>> Has anyone else run into problems with V-ray and Deep Compositing? >>> >>> Cheers, >>> Nitant >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> [email protected], http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >> >> >> >> -- >> digital compositor >> www.ellaboliver.net >> +1 917 657 7070 >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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