Each week, inXile will provide a gallery of art assets that it is currently looking for. Interested artists will then be able to spend the week creating 3D assets based on what inXile is looking for, and submit them directly to the Unity Asset Store.
If inXile decides to use your assets, it'll then pay you for your work, and credit you directly in the game. You'll also be given a special badge in the Unity Asset Store to show that you were a part of the project.
InXile says that, by using this open creative approach, its team will be able to focus more on increasing the game's overall experience and the elements that directly affect the gameplay.
InXile's Brian Fargo talked to Gamasutra earlier this year about being able to sidestep traditional publishers, instead raising money for a throwback RPG that isn't built for what he calls the "mythical mass market."