I was using auto which gave me Photo.
Even with Art selected, I can get cresent moon (not full) but it will be an artistic interpritation not photo realistic. If you want something not surreal do not choose art or be a lot more specific with your prompting.
Example. Art setting "Cresent moon in night sky" is artistic, but somewhat abstract and gives me full moons:
From here I could use the lower left to generate similar and move on from that point, which would eliminate the full moon from
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