Ryan Bloomer wrote:Thanks Rick, this is really helpful.
Couple of questions:
lp_Despill.... i'm assuming there's some type of instance of ultra keyer in there for the screentype that keys out the green, and then despills based on the color infomation on the background input? Looking at the Color channels it looks like there is alpha, but when looking at the alpha, the channel is solid?
Is there a way to see how you made your selections for for the semi-transpartent instance of primatte.... I can't get the alpha channel as clean as yours when trying to recreate the flow.
And I'm not sure what's happening with the ChannelBooleans3 (lp_Despill connected with the matte) Is the channelbooleans doing anything different than using a merge would?
Thanks again,
Ryan
Hi Ryan,
that Macro is my own tool, so it works a bit different than Fusions own ones. The despill is not made by an ultrakeyer but with channel expressions, using the CustomTool (which is super slow in F8, hope it gets fixed soon). No keying is done inside the despill, just the expressions (avg, min or max; yet I don't know if that version in the script already has min integrated). I'm actually working on an article to explain the basics behind it; you can also output a matte of only the spill by hitting the according checkbox within the tool (can be used for some interesting keying- and colour-correcting effects, too)
The Primatte is actually really straight forward, I usually start hitting the auto-compute and then switch to "select background" and clean up anything that my garbage matte doesn't take care of. I only use "select foreground" very slight, I think I used a bit on the semi-transparent areas in the cloth
The ChannelBooleans is only adding the Alpha-Channel generated in the "matte area" (the area left) into the despilled RGB. So basically, you use the RGB of the despill and add ONLY the Alpha. I don't know if Merge could handle that too, ChannelBooleans does this really well for me
Of course we have to premultuply it after that, that's what the "Alpha Multiply" is for.
I'm more of a Nuke user and have a different approach I guess, for example building top to bottom instead of left to right, haha
but definately check out the KAK to, I do believe it's an awesome tool