Scrapes the mesh with two angled planes at the same time, producing a sharp edge between them. This is useful for creating edges when sculpting hard surface objects.
笔刷的两个平面之间的角度，按下 Ctrl 反转角度。
When enabled, the base angle is sampled from the mesh surface. The Plane Angle controls how much the angle will increase when applying pen pressure. When pressing Ctrl, it locks the plane angle to 0 degrees.
Displays a preview of the two scrape planes and the angle they form instead of the cursor while performing the stroke.