Quake BSP Portalizer (BSP2PRT) Version 1.0 by Alex R. Moon BSP2PRT creates a .PRT file from a .BSP file which allows that .BSP to be "re-vised".
What that means is that you can now recompile all your maps to use GLQuake's transparent water with virtually _NO_ speed hit. This utility will also allow map-makers to re-vis their maps without having to re-qbsp them if the .PRT file has been erased or allow end-users to re-vis maps which were distributed without being fully vised.