here my issue :
I used to work with basic one alpha layer for the color grade, and it works always great.
I received, 2 alpha layers for 1 VFX, and I can’t find a way to use both separately in the color grade. Is it possible to do that, or RGB matte is the only possibility?
I also tried to transform those alphas in one RGB matte, but it doesn’t work as it should be. I can grade both as if it was one selection, but not separately.
I suppose I have to configure the external key node differently from a classic alpha channel, but I’m a little bit lost….
Thanks in advance and all the best
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