Hey, I'm just wondering how exactly this was done? I'm looking to make a mod that replaces the car with a golf cart, and was just curious how you got the images and everything. Thanks!

The images for the old model are simply a spritesheet from an old version of the game, which I reordered to make them work. For the updated model, someone on the Discord offered to make them for me. So I did nothing on the actual art creation there :P

I think this video may prove to be a useful guide for the process of making vehicle (or any other) sprite sheets for Factorio: https://www.youtube.com/watch?v=h36kd6wiWy8