We needed a bunch of signs of varying sizes, old and new, for electric and gas vehicles, as well as companies that service those types of vehicles, for use in POIs.
I tried to take inspiration from a variety of real world companies, as well as reference properties that I really enjoy (games and anime) and good friends, but also tried to stay true to companies preexisting in the game (such as Pass-N-Gas). In retrospect, I feel as though a lot of these signs might be TOO aggressive and sharply colored, but I imagine the in-game versions were toned down.
A majority of these were custom, with a few using some stock assets here or there. I provided both corroded and non-corroded versions to our 3D prop artists, and all assets were created at very high resolutions just in case. Corrosion was created using stock image scans of signs, but would've been fairly easy to do otherwise with brushes or texture scans.