ofn-luminosity-masks

[Krikor]

(11-20-2019, 03:51 PM)Ofnuts Wrote: What you are showing is not the L mask but the D mask. The L mask has the white on the right. See my previous answer.

I read, understood, but can't understand, because what I showed is what I always get when I create the L channel for this image.

Either manually, either using  ofn-luminosity-masks or Saulgoode's LuminosityMasks.

Sorry for the insistence. 

[Ofnuts]

Of course, your image has white on the left. But in the Curves tool (and Levels, and the Histogram display...) it is assumed that low values are on the left. Create your image with black->white instead of white->black.