Is there a way to gradually increase brush strength with each stroke pass?

[fast_cat]

I am just trying to find a setting that will allow me to paint with gradually darkening effects over each pass, while holding the mouse button down, and not having to keep clicking to increase the opacity/strength. Blender 3D calls this mode "accumulative strokes" I believe. Id like to lighten darkened areas and be able to evenly blend the strokes with the dodge/burn tool, starting with a very low strength and working its way higher. Thanks!