In this example, the Region Selection tool has been used to paint an area of the Landscape using the default positive method, then switching to the negative mask method that enables you to paint areas that
don't want to include, and finally showing the Use Region As Mask section that captures the entirety of a Landscape component that is painted rather than just areas within it.
Use the following controls to paint areas that can be used for selection by doing the following:
Left Mouse Button
Adds to the selected region.
Shift + Left Mouse Button
Removes from the selected region.