There are 15 total "inspiration" photos in 6th street and Lumina Square (each).
You will get a confirmation when you've gotten the "required" 6 photos, but there is also a message about "running dry" when you get all 15.
6th Street Help:
!If you're struggling with 6th street: there's 1 in Wise's bedroom that you need to be standing immediately in front of and another one in a back alley outside of the walkable zone.!<


