Create "Mix" node #2580
Create "Mix" node #2580
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This node allow let the user do a quick and simple mix (otherwise known as a dissolve/fade) between two input images.
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About the mixing itself: it's only correct for images with premultiplied alpha. This is a problem because we use straight alpha everywhere.
I think the best solution would be to have a "Separate Alpha" setting like for Resize. Basically, if "Separate Alpha" is checked, we assume that the alpha channel is independent of the color channels. This allows us to use (1 - mix) * input1 + mix * input2 directly if checked. Otherwise, we have to multiply by alpha.
What do you think?
backend/src/packages/chaiNNer_standard/image_utility/compositing/mix.py
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…ng/mix.py Co-authored-by: Michael Schmidt <msrd0000@gmail.com>
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I can see your proposal working and being useful in the current Ux for a lot of the chaiNNer workflows out there. I need to look at it from typical user's pov where they don't really want/need to have to deal with anything at that granular of a level besides just getting their chain to run and for the output to be predictable. Quite the opposite to a more informed, technical and also usually much more complex chain structure where the user would need and want to be aware of premultiplied RGB and other items. |
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Straight alpha really needs to go :) |
This node allow let the user do a quick and simple mix (otherwise known as a dissolve/fade) between two input images.