He spent years developing the technology to put the CGI backgrounds in as the actors were working so he can see what it will look like finished.
I'm definitely really looking forward to seeing what he's done. He honestly has never made a film I didn't really enjoy.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist