Indigo Renderer is an unbiased, physically based and photorealistic renderer which simulates the physics of light to achieve near-perfect image realism. With an advanced physical camera model, a super-realistic materials system and the ability to simulate complex lighting situations through Metropolis Light Transport, Indigo Renderer is capable of producing the highest levels of realism demanded by architectural and product visualization.
Now with the release of Indigo 3.0, new features such as GPU acceleration and realtime material editing make the creation and rendering of photorealistic images faster and easier than ever.
http://www.cgrecord.net/2011/06/indigo-renderer-30.html
