Hi. They hire me on a freelance basis & send studio refs my way from LucasFilm which I then use to create a series of sketches for approval. The sketches aren’t direct copies of the studio refs. I use them to understand the character rather than simply paint what I think the character looks like. When I submit the completed work they then send it to LucasFilm for approval. FFG works in collaboration with LucasFilm. The work gets signed off by FFG in the meantime so I can get paid, but I may need to do repaints If LucasFilm isn’t happy with my work. Hasn’t happen so far.