In the image above, I showcase the problem.
I have some marker brushes that have a nice texture on them which shows the tooth of the paper. I'd like to get a more consistent look when I'm coloring in an area, but when I go over the same area in more than one stroke, the paint darkens (Example #1). In example #2 I went over the same area, but within the same stroke. The color stays consistent in that case. This is the effect I want, but with multiple strokes. In example #3 I tried fixing the problem by selecting the area around the initial stroke with the magic wand and painting it in, but that leaves a white outline over the original stroke. Expanding the selection by 1 pixel results in a dark line between the strokes.
So is there a way to solve this problem so that I get a smooth, consistent look with multiple strokes, like in example #2 Where I only use 1 stroke?