I have just been exploring the latest 4.4 release of DT and decided to try out the sum mode in the mask manager for brush strokes. This sounded a nice way to do some dodge and burn with the exposure module. I have read the manual and played around and for the life of me I can not get any accumulative effect by using multiple brush strokes. I would really appreciate some guidance on what I am doing wrong.
What opacity are you using for your brush?
I tried various opacity settings like 20 to 50%