Actually the third one is wrong, too: the arcs and angles on the left side are very different. The band of bright light in the TLI shot actually makes sense: headlights and camps to the west. The star tracks in the first shot are also way too dense: like a double or triple exposure, and none of the time-lapse skies match with the snapshot foregrounds.
All in all, some ok visual puzzles but otherwise: meh.
Yes, it would seem the artist was interested in adding a few clouds for dramatic effect (I guess), so added two separate sky shots.
I doubt the objective was to present visual puzzles, but to simply craft some more interesting pictures using "artistic license". For me that is taking post processing a bit too far, although I do admit to twisting the saturation, hue, vibrance, etc... knobs to suit my pleasure:-) What the camera sensor and the human eye capture are not the same, so for me these adjustments seem fair. I do not object to the artists actions. Just not for me.
