We’ve talked about Octane Render before, the GPU-based, un-biased, physically based renderer that utilizes Nvidia CUDA for impressive parallel processing.

Yet, to date no other software makes use of it in the way that Octane does. With even a single mid-range GPU you can typically expect to see a 1000%-1500% (10X to 15X) speed increase over a typical un-biased, CPU based renderer. Not only is Octane Render the fastest un-biased renderer available, it is also fully interactive.  Settings can be left at a moderate level while adjusting the parameters of the scene such as materials, lighting options, and camera parameters IN REAL TIME.

Hit their site to buy a license for either the Windows or Linux version for $99, or check out a free limited-feature demo version.

Octane Render- The Interactive Physically Based Render Engine.