Fake means it is fake and has nothing to do with the real thing… Light probes are using calculated GI from your real scene “just downscaled” in a texture, becasue of performance reasons.
An No, there is no game on the market, at least not a AAA title which is using just a Directional and SKY light, it would simply look cheap and has nothing to do with a quality game.
Even Epic developed a new lighting or let’s better say GI solution just for the KITE demo. Can you imagine how the kite demo would look just with the influance of a directional and sky light ?
Doing so would make look the engine a bad joke on GDC and the kite demo would look just cheap, so it was a must to develope a solution. So once again no proffesional game would use just a directional and sky light.
And this brings us back to the main point, we need a solution, we a need a fully dynamic light solution which supports at least light probes for GI, something svoti like would be of course better.
Even the new Batman game and ARK are using self developed solutions, they’re solutuions aren’t looking that nice but hey…