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Hi fellas,
There is a minor subject that has caught my atention when working with the foundry’s nuke compositing system:
The rotopaint node. When I draw a mask and apply a feather to it, it somehow doesn’t have the softness of a mask created in other systems, for example, After effects.
Even if I choose, linear, smooth, 1, 0, the behavior of the gradient of the edge is not the same as the one I get with AE.
I guess this has to do with the floating point color space that nuke doest the math.don’t get me wrong, I love most of the feautures of nuke’s rotopaint, and even though I always find a way around it to get what I want in my comps, I wanted to know if someone feels the same thing about this subject, and maybe a way to get that soft gradient in the edge when increasing the feather similar to the AE.
You need to use both sliders, Feather and FeatherFaloff together.
Some times i use Blur node after rotopaint, works great.One more useful thing after make adjustments with Feather and Feather Falloff is to use the soft points to create individual soft curve on each point of you b-spline (Cmd/Ctrl + LMB Click and drag for each point or for all selected points). But, do this after adding and viewing Motion Blur properties for each layer. Shure, if you have no Motion Blur you can make custom soft feather for each point in any time.
But this is a recommendation and the solution of your problem is in sRGB viewer mode. When you looking through the Viewer you are working with sRGB colorspace witch shows you the right color on your monitor. But Mask is an Alpha-channel witch has no color information because it’s a greyscale image with data in gradation from 0 (black) to 1 (white) (if you have less than 0 or more than 1 – use Clamp node to cut). So, if you viewing your alpha-channel you must understand that you are viewing the sRGB colorspace image because your Viewer is in sRGB mode. Just switch you Viewer color mode to None and you will see the right version of alpha-channel. That’s a solution.
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