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Keying back a colour - I'm sure I'm being dumb but...

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Dave Austin
Keying back a colour - I'm sure I'm being dumb but...
on Jun 3, 2013 at 11:52:11 am

I want to key a colour back from my source to the end of a node tree.

i.e. - say I build a fairly heavy "look" with a few or more nodes, and I then want to key back blues from the original (or base corrected) image. I create a node in free space, connect it to the source node (before all the heavy corrections) but then I can't seem to work out how or where to connect the key and rgb signals in order to key the blue back in at the end of the signal chain....


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Rohit Gupta
Re: Keying back a colour - I'm sure I'm being dumb but...
on Jun 3, 2013 at 12:11:53 pm

Try using a layer mixer.


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Dave Austin
Re: Keying back a colour - I'm sure I'm being dumb but...
on Jun 3, 2013 at 2:19:41 pm

Thanks Rohit. But the layer mixer has only rgb inputs doesn't it? Where does the key signal go?

I sometimes use the parallel mixer, but it is hard to tell how it combines the signals.


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Mike Most
Re: Keying back a colour - I'm sure I'm being dumb but...
on Jun 3, 2013 at 2:46:39 pm

The layer mixer uses the qualification on each input node as its key for that node. Unlike the parallel node, the order of inputs determines the priority.


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Dave Austin
Re: Keying back a colour - I'm sure I'm being dumb but...
on Jun 4, 2013 at 10:50:07 am

Thanks, I managed to get it to work as I want. I don't really get it because I thought the key channel would need to go somewhere but happy to get the result!


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