When you are using many shape keys for your sculpting, you can decrease the value of a shape key to reduce your sculpt amount. But it will apply same value reduction on all the sculpt in the shape key. I want to tastefully erase only some of the sculpt in the shape key. Is there a way to do this interactively?
In zbrush, your can store a morph target, and use morph brush so that your sculpt can go back to the stored sculpt and your pen pressure will determine how much you can go back to it so you can choose which sculpt to keep and how much. In mudbox, there is a erase brush you can use it on a sculpt layer, and again your stroke and pressure will determine how much sculpt in that layer to be erased or reduced.
I do not see anything like that in blender.... If you are doing very sensitive and artistic sculpting, it is very nice to mix multiple layers of sculpt just the right amount..... I am surprised that there is no equivalent tool for blender that all the other major 3D sculpting sofewares have....