A blue shared some basic info about how the Transmogrify feature will work in Reaper of Souls.
Grimiku: We know inventory space is precious, so you won’t be required to keep the “visual” item in order to use it’s appearance. Instead, you’ll unlock the item’s appearance across all Normal (or Hardcore) characters on the account once you’ve picked it up. Any item appearance that’s been unlocked will be stored in the transmogrification UI.
From what the devs said about Transmog at Gamescom, the system is going to work a bit like the other Artisan functions. You’ll “unlock” some of the appearance options by upgrading the Mystic, and other more interesting appearance modes will be obtained in other ways. Probably some will be finding Plans, while others will be awarded for completing special events or quests. (Perhaps tied to Achievements?) In any event, it’s not some simple “found Armor X so now you can illusion to look like you’re wearing Armor X.”
Are you guys interested in the transmog feature? Would you admit it if you were?