tga file that appears in the preview while in game, place the file in a directory similar toĬ:\Program Files (x86)\Steam\SteamApps\common\sins of a solar empire rebellion\Textures When you want to test a map out, you should place it in a folder which should have a name similar toĬ:\Users\jsmith\Documents\My Games\Ironclad Games\Sins of a Solar Empire Rebellion\GalaxyForge The address on a Windows computer should be something along the lines ofĬ:\Program Files (x86)\Steam\SteamApps\common\sins of a solar empire rebellion\Galaxy Forge If you want to find the program, you can do a search for 'GalaxyForge' on your computer. Here's the wikia Galaxy Forge guide in case you want to look at that instead. The version for GalaxyForge should have 'Moon' as a planet type (aka Dwarf Planet in-game). Keep in mind that there's a different version of GalaxyForge for Rebellion. Here's a good video explaining how to make the map.
This is for Rebellion and not Trinity, although Trinity is pretty similar except for the file paths and the Moon (Dwarf Planet) planet type. Part of this is copy/paste from a few months ago, part of this is new.