EarthSculptor is a three-dimensional image editor, which seems to have been designed for surveyors (or for users who like to draw rugged terrain), being very simple to use, with an interface designed exclusively to quickly develop landscapes of all kinds through diverse rendering resources
These are some of EarthSculpto's features: automated on / off (shadows) of the rendering map, high resolution maps, eight detail textures, maps up to 4097x4097, terrain texture up to 4096x4096, real-time water reflector , eight tools to treat the terrain (level, erosion, ramp, etc.), editing with undo / redo options, etc.
You can free download EarthSculptor 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.