mental ray is a production-quality rendering application developed by mental images (Berlin, Germany). mental images was bought in December 2007 by NVIDIA. As the name implies, it supports ray tracing to generate images.
mental ray has been used in many feature films, including Hulk, The Matrix Reloaded & Revolutions, Star Wars Episode II: Attack of the Clones, The Day After Tomorrow and Poseidon.
Read more about mental Ray: Features