Speaking as a male, what I see building up to orgasm has more effect than what I see right before or after it.
The whole process of masturbation puts me in a sort of trance where I'm consumed by fantasy, but I awake quite suddenly to the real world once approaching orgasm. I can have the most banal thoughts during orgasm, including "I never noticed how quiet it is around here," and "I wonder if DeGrassi will be a rerun this week."
I haven't looked at any of these pictures, but I'd expect they wouldn't effect my enjoyment of masturbating. When I'm that close to orgasm, it just doesn't matter what I see or think about prior.