It does? I'm not sure what it is about that footage that seems mind blowing

https://wickedengine.net/

Mindblowing might be an overloaded, underdefined term but... the homepage top is a series of vids and if one bears through the anime stuff, one comes to rather fine terrain/foliage, weather, sky / volumetric-cloud renditions. Maybe that was meant above. It's all not readily myFavoriteAaaGameClone.Run() but at least it's quite wildly capable as far as the whole rendering-capabilities landscape nowadays goes.

Maybe I'm being thrown off by the anime characters, but I associate even the grass and trees with the kind of low effort 3d meme games that permeate steam. From what I understand, it's difficult not to make a game look like this if you're just throwing unity assets together.