When you work closely with film and photos, you notice that color is greatly affected by bright light and shadows. Color is less significant in some photos because of the way the light hits the film.
When you work closely with the JFK assassination photos - in particular, Willis 5 and Betzner - you realize that some alteration is very likely.
The fact that the man with the hat in the first post of this topic had to be turned, and twisted to arrive at the image seen... says that the photo was very likely altered.
Yes, there is enough photographic information in the Willis 5 photo under discussion here, to say with certainty that there is a man with a hat peering up over the retaining wall of the pergola, and he appears to have African-American features... Whatever anyone wants to call the man - prayer man, black dog man, etc. - is insignificant and off point.