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Valve VRAD
Our second content creation benchmark is a radiosity utility provided by Valve. VRAD is one of the three major phases in compiling a level with the Hammer editor for Valve’s Source engine. The first stage called binary space partitioning divides the level up into a set of polygons that can be represented as a tree-like structure. The second stage calculates visibility information for polygons and light sources. VRAD is the last stage, where radiosity is calculated for the level based on the number and positions of various light sources. It is also the most taxing of the three stages in compiling a level – hence the most useful benchmark from the perspective of a game developer.


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