The After Earth star has been planning to disappear from public life in his 30s since he was a teenager, only popping up from time to time to wow the art world.

He tells GQ magazine, "No one will know where I am in 10 years. They'll see me pop up, but they'll be like, 'Where'd you come from?' No one will know where I'm at.

"I've been planning that since I was, like, 13... It'll be kind of like (reclusive artist) Banksy but in a different way. More of a social impact. Helping people. But through art installations."

Smith reveals he's working on his craft at home building beds, closets and a 12.5 foot (3.8 meter) tall pyramid.