Photographic negative option

It seems like one feature I'm looking for is unavailable: photographic negatives.

I can do half of the job, a hue shift of 180 degrees. But I also need a Luma inversion. (Blacks become whites, whites become blacks)

I would prefer a pure photographic negative. But since color infomation is taken out by 100% desaturation, a luma inversion would work just as well. I just have to work around a luma inversion plus a 180 degree hue shift.

This would be perfect for Red and Cyan Anaglyphs. The logic of your editor uses CYMK, start at White and build tour way darker.

I understand RGB Editing might have a tough time, but that's the easy solution for me.

But adding color inversion might work better for you guys programing it.
 
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