A simple step by step example - say converting a picture to pure black and white - would do for now.
Possibly defining a variable of grayscale as threshold, and use a checkbox to invert.
Also the global functions - "apply" "apply globaly" "reset to default" "preview window"... should be covered superficially
After thinking about this for a while it dawned to me, that the already available process "RangeMask" should be covering exactly that - besides featuring two thresholds.
Will have a look into this script.
Possibly I can figure out whats going on.
Doing the same with PixelMath is dead simple - so I have hope.
