dont blame ITV HD for this blame the director Michael Mann, it was shot this way for... realism. Read this
"I really didn’t care for the way a lot of scenes looked in Miami Vice. The picture looked very grainy in several scenes, making some of them look absolutely horrible. For some scenes it seemed like there was a lighting problem of some kind. I’ve read that Mann used HD to film this movie. I really don’t know anything about HD and how that makes a movie look. I thought HD was supposed to give better quality, but if this movie is typical of what one filmed in HD looks like, then something needs to be fixed. The quality of the picture was very bad and even had a cheap look in several scenes. Some of the scenes looked like they had been shot on the security surveillance cameras that some stores use. Maybe Sonny’s hair kept looking like it was changing colors because of the HD. In some scenes it looked all dark and in other scenes it looked like he’d colored it blond, or at least tried to. That wasn’t a good look, though it looked better in some scenes than others. At one point, even his eyebrows and stubble looked lighter."
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