Mads Mikkelsen knew the visuals of 'Doctor Strange' would be ambitious because the comics are like a "graphic novel".
The 50-year-old actor stars as Kaecilius, one of the Masters of Mystic Arts, in the superhero movie and admits some of the effects in the motion picture are "completely different" to some other action films.
He told HeyUGuys: "I had a hunch it would be [ambitious] because I knew the comic books.
"It's almost like a graphic novel, the visuals are a completely different world in terms of turning the world upside down and using magic."
Mads' character Kaecilius has some heavy eye make-up, and despite having the effect applied for two hours a day, he found it a relaxing process.
He added: "I spent two hours every day [in the make-up chair]. It was two hours of nice relaxation and I go and dream somewhere."
Mads stars alongside several others in the movie, including Chiwetel Ejiofor (Karl Mordo),
Rachel McAdams (Christine Palmer), Benedict Wong (Wong) and Benedict Cumberbatch, who plays the titular mystical superhero.
Benedict, 40, recently admitted he used his role to get into shape for his wife Sophie Hunter, 38, and to keep up with their 16-month-old son Christopher.
He said: "The physical regime helped. That wasn't just for the obligatory shirt-off moment. It was keeping healthy for my new family."
But his stunts didn't always go well as he to seek medical attention at times.
He said: "There were a few crisis meetings with a chiropractor or somebody with some Tiger Balm, but I was very well looked after, as anyone is who does these films."