I am guessing you didn’t look at the attached screenshots above. Clouds look pretty genuine to me. 3d even.
Some of the photogrammetry looks terrible even after fully loaded. Go take a rip around CYVR. Downtown Vancouver is well modelled but the PG textures look terrible. This is an example of the early attempts at computer generated PG that just doesn’t work well.
From CYVR run down to Seattle. They attempted to do a PG forest. Didn’t work very well.
This will improve as they slowly figure out the technology and the available data becomes more refined. But for now, it really is just a novelty.