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CSTRAD is a custom version of VRAD compiler written by Adam McKern. Similar in function to its Valve counterpart, CSTRAD creates a lightmap data (radiosity lighting) that will light your map.

Although CSTRAD itself can be skipped during compile to create an unlit map, using the other two tools, CSTBSP and CSTVIS, is highly recommended for optimal results.

Note.png Note: While it was originally intended to be a complete replacement set of compiling tools, the CST series is now largely deprecated, lacking the newer features such as HDR.

See also