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Brigade is the successor to the Arauna real-time ray tracer, which some of you may know.Path tracing outranks path tracing in the sense that it adds full global illumination in a single elegant algorithm, but also because it is even more computationally expensive. For that reason, Brigade uses as many GPUs as you can throw at it (although a single high-end GPU already gets you pretty pictures).Brigade has been used for a numer of projects by students of the IGAD program (International Game Architecture & Design) of the University of Applied Sciences, The Netherlands. One of these projects is 'Reflect', a Portal-inspired first-person puzzle game. This game has been released today, during the Global Game Jam right here in our building, and can be downloaded from http://igad.nhtv.nl/~bikker . The download includes source code, and lib files / headers for the path tracer, in case you want to experiment with it yourself....For NVidia GPUs with compute capability 2.0 or 2.1.