Finally got around to trying this with the latest master branch, thanks! It works well and I just noticed one minor glitch - right after pressing freeze, if I adjust the values in the newly created const module, the image doesn’t update to reflect that change. But if I exit and reenter darkroom, or do something in the pick module, then it does update.
thanks for letting me know! can’t reproduce after 62cd04ea, let me know if that works for you too.
I’m still seeing the same behavior with fff56f09: if I apply pick-neutral.pst, pick a spot, and click freeze, then the sliders in the const module have no effect until I either exit and reenter darkroom, or pick another spot in the pick module. As soon as I do either, the image updates to reflect the values of the const sliders (not the value of the newly picked spot since that module is disconnected).