Hey guys!

I want to create and sell my own 100% original posters (2D illustrations) of cars and wanted to know if need to pay a commission fee to every car manufacture for using their car model?
People have told me that I only need to do that if I 'trace' the manufactures press photo... Or if I want to be officially licensed by them.
What's the reality/correct answer to this?

I will be very grateful for any support that I can get.