I know as a game engine, we aren’t trying to simulate everything in the nature. But it is already very close to this point now.
Can we image we have a huge library, cover all the material in the nature , industry, city, countryside, element could have standard and pure material. We could make such a library, easy to purchase from marketplace, it is very well organized. search by its name.
I think we are very close to this point. I have go over the material catergory in marketplace, I think it could be better organized.
But Unreal is very real. I really like it.