It's off to a good start! I think you're going to want to print on a blue shirt vs tinting the artwork blue. If you look at the collar of Pitt's shirt, you can see that the shirt itself is blue (and no artwork on the collar). Plus, there is a lot of blue sky in the artwork. Printing it all on a blue shirt, reduces the amount of blue needed to be printed. I would guess the silk-screening (or whatever process was used) was done doing only one pass so that the blue could bleed through the artwork on its own.
Notice on Pitt's shirt, some of the photos repeat and are quite large...there really aren't that many shots used. My only suggestion to your artwork so far would be to try to mimic at least the size of each image to the screen-used shirt as closely as possible. Some of yours look too small and there might be too many different photos used.
Also, I know finding the exact photos used will be next to impossible, but how close do you think you came? What era are the photos you're using taken from? Are these the only photos you purchased?
Sorry for all the questions. This shirt has been desired around these parts for a long time. Hoping to see it finally happen!
