cubism questions

I think that there was at least a couple of hundred pictures taken for this image.every day people living there life going to work,shopping having a good time in there town.I think theses photos were taking at the same time but some photos were used with flash and some were not.I don't think theres any processing of photoshop in this image because it does'nt really show that its photoshop unless if they probably photoshop some trash on the floor and thats about it.