Image Luminance Mask
This features documented is out of date and completely wrong. Who knows what version that changed in.
There is a lot going on with this simple control. Beyond basic DOC text description a few sample use case screenshots of the control could be illuminating. e.g. Setup like this to ...
- Basic/classic luminance mask, dark to light.
- Shadow/highlight protection. This is the current control default.
- Like this to isolate some midtone zone.
The Blend-If controls are similar and the DOC wording there is nicely descriptive and similar would be a big help here.
Love this particular mask feature BTW. Figured it out using a test photo (DPR studio scene) with a Kodak gray panel strip and watching what each slider did. I was masking a hideous amount of noise addition to easily see the mask effects.
On another note the Skin Retouch effect is completely undocumented.