Greg Sestero stated in his book The Disaster Artist that Wiseau took 32 takes to say the lines "It's not true! I did not hit her! It's bullshit! I did not. Oh, hi, Mark!" Wiseau sometimes needed cue cards to help him with his lines.
Shot simultaneously on 35 mm film and high-definition video. Tommy Wiseau was confused about the differences between the formats, so he used both cameras on the same mount. He also purchased the cameras, instead of renting them as film productions usually do.
According to Juliette Danielle, when Tommy Wiseau said the line "In a few minutes, bitch," everyone on the set began laughing at him. Wiseau came out of the bathroom and demanded to know what was so funny.
After a very limited theatrical run, the film has become popular as a "midnight movie," with a cult following. Audience members dress up as the characters, throw plastic spoons at the screen, and toss footballs to each other. Tommy Wiseau attends many screenings, and holds Q&A sessions with the audience.
After filming the first love scene, Wiseau decided to write in a second love scene, but the actress playing Lisa was uncomfortable. As a compromise, the second love scene between Johnny and Lisa was created from unused shots from the first love scene (which is why the candles are already lit when they arrive).
Kyle Vogt had to leave before all his scenes were shot because of a prior acting commitment. He told Tommy Wiseau about it months prior, and Wiseau assured him filming would be wrapped by that time. That explains why his character, Peter, is not at the party at the end. Peter's lines were given to Steven (Greg Ellery), a completely new character who unexpectedly shows up at Johnny's birthday party. One of Peter's last lines is "That's it; I'm done."
Tommy Wiseau esoterically addressed several fan questions in a special Q&A feature filmed for the DVD release. Among these are "Why is it called 'The Room'?" (to which Wiseau replies that the title is meant to evoke a safe place for viewers) and "Why is everyone playing football in tuxedos and standing only three feet apart?" (which Wiseau doesn't answer except to say that football is fun and that playing it without protective gear is a challenge).
In an interview with Entertainment Weekly, script supervisor Sandy Schklair claimed that it was he who actually handled the direction of the film. According to Schklair, Wiseau was too busy with his acting duties leaving Schklair to do the directing. Schklair's claim was corroborated in the article by a cast member who remained anonymous. Wiseau has denied the claim.
A lot of the film's dialogue was dubbed in, which is why there are many out-of-sync scenes, particularly those involving Johnny. Tommy Wiseau was said to unable to memorize lines, necessitating the use of cue cards, and the sound crew was reportedly plagued with difficulties.
Greg Sestero stated in his book The Disaster Artist that Tommy Wiseau took his movie so seriously during production, that he told Sestero that the lines he wrote were so amazing that they wouldn't be able to put people to sleep. Ironically, Sestero found some truth in that.
Greg Sestero, who played Mark, wrote a critically acclaimed book about his friendship with Tommy Wiseau and his experiences making The Room, entitled "The Disaster Artist." The book was published in 2013, the 10th anniversary of The Room's premiere.
In his book "The Disaster Artist," Greg Sestero describes being originally hired as a line producer (despite having no knowledge of what that entailed, let alone experience). However, Tommy Wiseau always intended Sestero to play Mark, and since the role was already cast he devised a scheme to force out the original actor. Sestero, originally refused the role because the love scenes made him uncomfortable. Wiseau compromised by allowing him to wear jeans.
Much of the furniture and decor for the living room set was a complete display room taken from the window of a thrift shop. The glass-top television table supported by white pillars belonged to Tommy Wiseau. When the cinematographer complained that the set was too sparsely furnished, Wiseau sent the art department out to buy new items. They returned with framed pictures of plastic spoons, which Wiseau, impatient to continue filming, ordered hung up. Plastic spoons have become a staple of "midnight movie" showings, often being thrown at the screen when a picture is in the shot.
Juliette Danielle was shocked by the lengthy sex scenes during a screening; she thought they were going to last a couple of seconds. In fact, Tommy Wiseau was so pleased with the sex scene footage that he wanted all of it in the film, before being talked out of it by the editor. The first sex scene between Johnny and Lisa was nearly six minutes before being cut in half.
According to "The Disaster Artist," Greg Sestero broke up with his girlfriend just before second unit filming began for outdoor scenes in San Francisco. Tommy Wiseau, to Sestero's horror, decided to use this as inspiration and wrote a few new scenes between Johnny and Mark to film in SF, such as the talk in the coffee shop and the football game in the park.