I love the intelligence of the "contrast" module in Startools. There are times, however when I feel I'd like to be in more control of it - of course, I could well not completely know what I am doing. The examples below is from data, most generously shared by Scott Rosen (http://www.astronomersdoitinthedark.com/) of LDN1235 (Dark Shark). I have worked with this image in three layer: stars, nebula and star glow, starless. I'm reasonably happy with the result but feel it could be better if I could manipulate contrast on the starless layer more subtlety. I've tried making adjustments with the contrast module but always come up with something radically different than the original making blotches and hard lines rather than mild changes to the black and white. Am I using the module incorrectly for this or is there another way of achieving what I want within startools? I find that I usually end up moving over to software like Darktable to do a lowpass overlay to get what I want. Anyway, after I have blended the layers together, I worked with the oontrast module and it does a much better job but it also seems to wipe out some of the great nebulocity that is apparent in the starless image. These are links to the final result and then the starless image. Thanks in advance.