Create perlin noise terrain or import your own height map. Run erosion simulations on this terrain, add textures, and export in a variety of formats including 3D meshes as .obj Most inputs have additional info text you can read. [FAC] - factor. A value used in multiplication [TU]terrain units. There are 255 units in an 8-bits-per-channel heightmap [PX]-pixels [NUM]-number [RGB]-an RGB colour, 8-bits-per-channel [PERCENT]-a percentage value, ranging from 0-100 [ANGLE]-an angle, ranging from 0-360