Now that The Beatles: Rock Band has been out for two weeks, the developers at Harmonix are letting us peek a bit more behind the magic curtain of creativity. In this documentary-style making of video, creative director Josh Randall, lead artist Dare Matheson, art director Ryan Lesser and environmental artist David Boghdan talk about what went into the making of the Sgt. Pepper's Lonely Hearts Club Band dreamscape level.

They particularly mention how the Sgt. Pepper's background is loaded with references to other Beatles songs.

Other things to look for in The Beatles: Rock Band:

Original duds. In Yellow Submarine, if you look at the Beatles' outfits they are actually wearing the outfits from the original movie but three-dimensionally rendered. "That's probably the only outfits in the game that the real Beatles never actually wore because it was just from the cartoon," Matheson says.

Beatlemania. Songs played in the live concert venues such as Shea Stadium and Budokan have audiences based on the real crowds. "When we were watching the original films of the band performing live, we realized that part of the energy came from the shots of the audience," Randall says. "You would see these teenagers absolutely losing their minds. We came up with some new technology that created these high resolution 3D crowds that depict the fans losing their mind."

Beatle chatter. Music supervisor Giles Martin went back to the Beatles' original master tapes and found outtakes of the Beatles chatting before and after songs. "So there's a ton of stuff that people have never heard before of the guys tuning up or cracking jokes," Randall says. "It's really feeling like you are in same room with those guys." Also, Matheson said, "that on the albums the endings of the songs actually fade out and Giles Martin went back and got rid of the fade-out on so that on a bunch of the songs you get to actually hear them finish the song."

Real world references. Randall and Matheson visited London and went to Savile Row and shot photos of that block for the rooftop concert venue. "We didn't try to get accurate down to each building but I felt it was pretty helpful while assisting the environment artist," Matheson said. "We took some photos of the old fireboxes around there and worked that into the street level scenes. We have these moments just like in (The Beatles) Anthology where they may be showing you footage of the rooftop concert and then would cut down to the ground, down to the street, where people are looking up trying to figure out what is going on up on the rooftop. And you will see police directing traffic. So we were able to get some live reference for that."

Blue Meanies. "We wanted to put some Blue Meanies in the game be we could never actually find a spot for one," Matheson says.

Well, there is one, "if you look," adds Randall.

Hint: watch the cinematic closely as it gets psychedelic.

For more on the art in the game check out our story here.

By Mike Snider