Which photorealistic rendering system was used in Tarsem Singh's directorial debut?
Blue Moon Rendering Tools
Title: The Cell
Passage: The Cell is a 2000 American science fiction horror film directed by Tarsem Singh in his directorial debut, and starring Jennifer Lopez, Vince Vaughn, and Vincent D'Onofrio.  It received mixed reviews upon its release, with critics praising its visuals, direction, make-up, costumes and D'Onofrio's performance, while criticizing its "Silence of the Lambs"-inspired plot, an emphasis on style rather than substance, and masochistic imagery.
Title: Brazil R/S
Passage: Brazil Rendering System was a proprietary commercial plugin for 3D Studio Max, Autodesk VIZ and Rhinoceros 3D.  Steve Blackmon and Scott Kirvan started developing Brazil R/S while working as the R&D team of Blur Studio, and formed the company SplutterFish to sell and market Brazil.  It was capable of photorealistic rendering using fast ray tracing and global illumination.
Title: Blue Moon Rendering Tools
Passage: Blue Moon Rendering Tools, or BMRT, was one of the most famous RenderMan-compliant photorealistic rendering systems and was a precursor to NVIDIA's Gelato renderer.  It was distributed as freeware.  BMRT was a popular renderer with students and other people who were trying to learn the RenderMan interface.  It also had some features PhotoRealistic RenderMan did not have at time, for example, ray tracing.  Even Pixar used BMRT for ray tracing before PRMan had such features.  According to Exluna, it was used for 3D rendering in movies such as "A Bug's Life", "Stuart Little", "The Cell", "Hollow Man", and "Woman on Top".
The Cell Blue Moon Rendering Tools