Ivan Reitman looking to film Ghostbusters 3 in 3D. Ivan Reitman is rumoured to be working on Ghostbusters 3 in 3D. The third Ghostbusters film is to arrive in theaters “with the added benefit of stereoscopic 3D”. Stereoscopic cameras record an image to give it the illusion of depth, reports Marketsaw. Reitman also said that the film’s script has been completed and a second draft is currently in the works. Filming is expected to begin in 2011.