How could you make a 3d key like these?
in The Commons
https://www.renderosity.com/freestuff/items/98958/bg-characters-011
would be amazing to know how to make other items like these were made if anyone has a clue/tutorial to follow?

Comments
Probably some sort of AI to 3D model generator. I don't know any off the top of my head, but that would be a good search starting point.
Those are not 3D figures' just AI generated images turned into 2d billboards. There is no geometry in the products.