Nitrous is a next-generation game engine designed to handle enormous amounts of visual and gameplay complexity, from 10,000+ simpler units to 1,000 highly complex units and environments.
To enable the Map Editor add the “-modding” (without the quotes) to the Launch Options for the game. That will add a Map Editor button to the main menu of the game. From there you can decide if you want to modify an existing map, or create a new one. If you create a new one the menu to the right is presented. For your first map I’d select a smaller map size. You probably assume that you will run out of space quickly on small maps, you would be wrong. Ashes small maps are what other games would call huge. The large ones are ridiculous and will take a lot of time to design. Practice on some small ones first. I selected Terran (grassland) terrain and default lighting. As you will see in the demo I change to Frozen terrain later, it’s easy to do so don’t worry too much about your selection here. The following is the default map that you are given. It starts with 2 player Nexas’s (Nexi?), a Turinium Generator and one other region. But we have lots of things we can add.
See Modder’s Guide for Ashes of the Singularity Indiedb.com