Enumeration of the render passes in the built-in paint material.
| RaiseLowerHeight | Built-in render pass for raising and lowering terrain height. | 
| StampHeight | Built-in render pass for stamping heights on the terrain. | 
| SetHeights | Built-in render pass for setting terrain height. | 
| SmoothHeights | Built-in render pass for smoothing the terrain height. | 
| PaintTexture | Built-in render pass for painting the splatmap texture. |