Hey Concept Art, I came here because some image source search engines weren't helping much.
A friend of mine works as a professor at an art school and is helping run a contest for the students. They got a hold of the attached image here and immediately saw it was a paint-over of something else. You can see that there are style contraindications between the tops strokes and that background.
We have not been able to place the original image, all we know if that its a sci-fi thing and it says San Francisco in the background.
If anyone here recognizes it please let me know, as this contest thing is a bit time sensitive.
I don't know the source you're talking about but could not be a paintover, it's a common technique to use photos in this kind of environment to enhance the level of detail of the scene and give to the eye something to catch here and there that is recognizable for the viewer.