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I wanted to mix channels with some type of math combinations in combustion… to Subtract the red channel from green channel for a simple green screen matte extraction… but not sure what operator to use. I was guessing the RGB Channel Math, however can someone direct me and give a brief discription of a the process. Thank you
Hello,
to extract the channel you can use the Add Grain tool “use exclusive button”. After your math operation you can swap the channel witht the Compound RGB Arithmetic.
Nb. If you need colored version of your channel, Create a new solid layer whit a 100% red and use the merge tool to put over it in ADD mode.
chear
luc
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