I really work at lighting to make renders look "real". It's an impossible goal, because of the uncanny valley and various other problems with rendered images that make them look artificial, but there are ways to make renders seem naturally lit that earns them a pass in the viewer's brain, so that they seem nearly real. 3D lighting – traditionally – didn't use the real physics of lighting. It simulated the physics in a half-assed way, because actual light simulations are very demanding of processor resources and the chips to perform those tasks didn't really exist. (If you doubt me on this, go watch The Incredibles and then immediately after watch Incredibles II – your mind will be blown by the difference and you will completely understand what I'm writing about.) Beginning about six years ago, tools became available in consumer-grade equipment to make it easier to simulate the actual physics of light. 3D renders created that way have a big advantage over the ones that came before.