In an early next Gen episode, 11001001, a group from a race called Binars are on the ship upgrading the holodeck. This is the start of holograms being more human like. I made three assumptions after that episode: 1, that the Binars continued to go around and upgrade other ship holodecks, 2, that these upgrades were reverse engineered and incorporated into future holo stuff, and 3, that Starfleet didn't actually know how the upgrades worked. I think this can account for how advanced holo stuff is when it should be just controlled by the ship computer.