I know of that thread. Upon trying to look at histogram, it seem like the M is where it should be. The brightest is right at the middle, and the others go all the day to dark.
I’m using Krita, afre. The MM, and MMM seems just about right in the histogram. But, I’m more worried about the center of the gradient part of the image.
These layers are generated with clone layers and a bunch of adjustment layers/masks. So, all I need to do is copy and paste, and these masks are automatically generated.