World Machine is described as 'Powerful terrain generation software used by game developers, visual effects artists, and independent creators to create realistic 3D landscapes and terrains' and is a 3D Modeler in the photos & graphics category. There are more than 25 alternatives to World Machine for Windows, Linux, Mac, Unity and Steam. The best World Machine alternative is Houdini. It's not free, so if you're looking for a free alternative, you could try Terragen or Infinigen. Other great apps like World Machine are Vue, World Creator, JangaFX GeoGen and Terresculptor.
Does not create 3d models on 2d pictures