Hello, this is my first post in here. I am normally more to photography and terragen. I am creating a space-nebular as can be seen in the picture. In **Set 1** is are two copies of the nebula. The lower is set to blending *normal*, the above has blending mode *color dodge*. The curves-layer just happens to be there ;-) Looks fine so far, but I would like to merge those layers to continue brushing. Look at the image in the second post, which is after merging. I tried several ways of combining these two layers and this is the darkest result, I can't get it any darker - or even in the original look. Any hint is wellcome, regards, Volker Harun