This is one of over 4720 effects generated by Filter Forge, a Photoshop plugin that allows you to create your own filters.
To open this filter, you must have Filter Forge 1.0 or higher installed on your computer. If you don't have it installed yet, click here to download Filter Forge
This is mainly a filter to get the bump/normal information for large scale planets. I borrowed some ideas from other filters to achieve this. Sprocket's Landscape Maker was the main one that comes to mind, so please check that out!
landscape landscapes map terrain islands ocean land erosion ridges vegetation jungle plains topography landmass world worlds earth planet