What made you think that a sky management/rendering system is their Global Illumination/GI solution?
Also going back a bit
I covered this in reddit when someone else claimed it a few weeks ago, and the game is obviously 99% C++, there is almost nothing done with blueprints. In fact if you want solid proof of this their Dev Kit is out now and they have exposed a whopping 4 of their c++ functions to blueprint, its literally unusable for most things until they support blueprints better.
I understand that you made the account to come and trash Ark for some reason, but you’d think you could stick to their steam forums if you want to spread misinformation. This is the last place on the web that is likely to accept it.