I ran across a book that was something of a revelation to me. It showed how many well known and well respected artists have used photos as a basis for their paintings. I won't say any more. See for yourself... a small sample:
The Eiffel Tower by Robert Delaunay..from photo
Dog by Francis Bacon from a Muybridge photo
Drawing of Renoir by Picasso..from photo
Bather by Cezanne....from photo.
Nude by Edvard Munch...from photo.
Francis Bacon's wrestlers from photo by E. Muybridge
Francis Bacon used a still from the film Potemkin as a basis for his Pope portrait.