Hi Adam, If you are trying to copy the color values of a 3D render on its own deep opacity you should use the deep recolor node for sure. The reasons why you have artifact is because your deep opacity isn't matching at 100% the alpha channel of your 3d render. If you ping-pong between the deep opacity and the alpha you'll see a difference. Why ? Because the filter setting you've got on your render (Blackman-Harris, Mitchell, etc.) aren't the same than the deep image filter. Basically the only filter that is the same for both is Box filter. So why do you have artifacts ? To understand that issue you have to know that the deep recolor is doing an Unpremult of your 3D render and then "multiply" it by the opacity level of the deep stream. It's like if you are repremultiplying a 3d render in Nuke with different alpha than the original... you'll have edges artifacts. Well, it is the same for deep stream. Here is a way to avoid this issue : Before plug 2D stream into the deep stream with a deep recolor, just do an unpremultiplacation test to see if you don't have illegal values (negative valus, nan, extremly high values). Then I strongly recommend to really do the unpremultiplication before and then the trick is to use the "alpha" of the deep image (with a deeptoimage) to remultiply the image before plugin it into the deep recolor node. It's a bit of an overkill but it works perfectly well.
For the deepholdout question, in the current state of Nuke you can't have a deep stream after the deep holdout. But I'm sure Nuke will do it in the future. I hope it helps. Denis. - FuelVFX 2012/7/12 Adam Hazard <[email protected]> > Hi, > > Anyone know if it is possible to copy deep values, and add them into a non > deep image? Maybe something like image>deepFromImage>**deepExpression(with > copied deep values from a deep read)? Deep recolor doesn't seem to be > doing the trick and is adding some edge artifacts and nans. > > Or on the other hand, and slightly related, if it is possible to some how > keep deep information after a deep holdout? > Thanks for any help. > > -Adam > ______________________________**_________________ > Nuke-users mailing list > [email protected].**co.uk<[email protected]>, > http://forums.thefoundry.co.**uk/ <http://forums.thefoundry.co.uk/> > http://support.thefoundry.co.**uk/cgi-bin/mailman/listinfo/**nuke-users<http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users> >
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