Another example of the limitations of modern game engines, though he didn't attribute any challenges to the limitations of the game engines themselves.  Younger lion really thought making a starship version of an asphalt game would merely require importing artwork into an existing framework.  The framework would automate all the physics.  That doesn't exist. Modern game engines just provide a basic graphics layer, a basic physics engine, a basic camera algorithm but going from that to something useful is a big deal.  3D modeling is also a lot more manual than expected.