From Valve Developer Community
Revision as of 20:18, 5 December 2008 by TomEdwards
aldelr CSTVIS is a custom version of VVIS compiler written by Adam McKern. Similar in function to its Valve counterpart, CSTVIS creates a vismatrix data allowing sections of the world to not be drawn when they are not visible.
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.