I have made quite a few Automation cars for Beamng i also want to know some suggestions from you guys.
One of the biggest suggestions I can give is use other real cars as references. Your cars dont have to even look similar to the reference car but it's a good way to make sure your headlights, grilles, mirrors, etc... are sized and positioned properly.
i made a GTR that i'm very happy with. --- Post updated --- My Gremlin is being approved hopefully it will be up soon