TerrainPainting
Painting vertex colors onto objects doesn't seem as popular now as it was in years past, but it can still be handy to recolor or tint parts of terrain without needing more texture data.
How quickly the paint color is blended onto the terrain. Lower is usually better, as this will allow you to slowly add color to the terrain, as opposed to making it look like you attacked the terrain with a Magic Marker (like in the screenshot).
The color that you want to paint onto the terrain.
Save the terrain painting canvas to a file. I guess if you want you can treat this program like a worse version of Microsoft Paint or something.
Does the opposite of Export Canvas.
Look I'm writing this documentation at three in the morning and I really don't think I need to put down this information here for the third or fourth time.