Barrie,
It is kind of scary how easily some of this AI is progressing but is the sky replacement feature also AI driven?
The result is impressive and hard to tell. The only thing that ay go against you in this portrait is the hands

I view this as an extension of the sky replacement feature. With regard to rules, most rules states that all parts of the image, must be your own work, so you can replace with another sky you photographed. That said, how would we know?
Perhaps something to show off one members evening?