Heightmap into brushes

I have some height-maps and would like to use them as a brush or as a stencil to form hills and cliffs. I will include some examples. I added a folder called Gizmos and added it to my asset folder and names the height-map brush_01 but all it did was made a square. I have no clue if this is possible in unity. As you can see in both photos the gray height-map and the textured, how to achieve this.

take it by no reply’s that this is not possible in unity

Have U by any chance stumbled upon solution for this: heightmap.png to .brush ?