with Riley Steele, Kelly Brook said, "It was really difficult. Holding your breath while making out with someone as hot as Steele. I had to learn to hold my breath for a very long time." Brook also said that the pair had to have "a lot of practice" before filming the scene. Post-production Citing constraints with 3D camera rigs, Aja shot Piranha in 2D and converted to 3D in post production using a 3D conversion process developed by Michael Roderick and used by the company, Inner-D. Unlike some other 3D converted films released in 2010, Piranha'''s conversion was not done as an afterthought, and it was one of the first post-conversion processes to be well received by critics. Eight years after the film's release, Aja spoke of post-production disputes that occurred while finishing the film. He claimed that Dimension found effects artist that were much cheaper than the ones they had currently employed, this included artists who never did conversion work before. By June 2010, not a single piranha was completed for the film, leading to Aja reaching out to the Directors Guild of America to remove his name from the credits out of frustration. Bob Weinstein caught wind of this and fired all the artists and instead hired every VFX vendor available to finish the film. On top of this, executive producer Harvey Weinstein supposedly hated the film, expecting it to be more in line with Jaws, instead of "Jaws Gone Wild" as Aja put it. ReleasePiranha 3Ds theatrical release date had been set for April 16, 2010, but was delayed. The film was planned to premiere on August 27, 2010, but in June 2010 was moved to August 20, 2010. The film's first trailer debuted with Avatar. A second trailer was shown in prints of A Nightmare on Elm Street and Inception. It was set to have a panel on 24 July 2010 as part of the San Diego Comic-Con International but was cancelled after convention organizers decided the footage that was planned to be shown was not appropriate. Nine minutes of footage, with some unfinished effects, were leaked onto websites. The clip used in promotional television ads and the trailer that shows Jessica Szohr's character, Kelly, face to face with a pack of piranhas was not used in the movie, and was used for promotion only. The official poster was released June 22, 2010. Box officePiranha 3D