He’s really a burns victim, and it’s not going to be fun for him when he’s not in the suit — he’s going to be uncomfortable.
Vader’s very, very bad, and so you try and just glimpse something of him that gives him some humanity, or it makes you empathize with him.
I love the idea of showing that he’s vulnerable as well.
[The bacta tank scene] was actually a Chris Cunningham-inspired thing of the idea of being in milk [like in the Bjork music video] All Is Full Of Love.