Layer Brush

Layer: The Layer brush raises (or lowers, if ZSub is on) the surface on which it is used by a fixed amount, determined by the value of Z Intensity. The defining character of the layer brush is that when a stroke overlaps itself, the overlapping parts of the stroke do not undergo additional displacement. This makes the layer brush ideal for changing the displacement of an entire area by a fixed amount; simply scrub across the surface, without worrying about dragging the stroke over itself. Also, if you set a morph target on the model immediately before you start sculpting with Layer, then Layer will sculpt to a constant depth above or below the original surface, regardless of how many strokes you use and whether or not they intersect.