Aerialod is a very easy to use, free and open-source 3D terrain generation edge tool, developed by ephtracy (the author of MagicaVoxel). It can help you easily generate various types of terrains, render real satellite data, generate synthetic height maps, use HDR rendering, output maps up to 16K, and much more. This is enough to make it easy and fast for any user who doesn't know anything about modeling to create a 3D map.