It is designed to replace the Q3Map.exe that comes with QERadiant, GtkRadiant and GMAX Tempest.
However, there are significant enhancements that require a little twiddling to use, such as faster lighting and enhanced surface production.
Qfusion is a 3D rendering engine based on sources from Quake II code.
How to use FBSP (QFusion BSP) for compiling maps in FBSP use this version or q3map2:
add: '-game qfusion' to your cmd line parameters. (And you have to give the path to qfmap2.exe, of course).
Q3Map2 is a BSP compiler for Quake III engined games, and has partial support for Jedi Knight II and Soldier of Fortune 2.
Quake 3 Arena/Team Arena
Return to Castle Wolfenstien
ET Urban Terror
Soldier of Fortune II
Star Trek Elite Force
Star Wars Jedi Knight: Jedi Academy
Star Wars Jedi Knight II: Jedi Outcast
Tenebrae (Quake1 Engine Modification Project)
Wolfenstein: Enemy Territory