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glBSP is a Node builder specially designed for OpenGL ports of the DOOM game engine. It adheres to the GL-Nodes Specification, which means it adds some new special lumps to a WAD file that makes it easy and fast for an OpenGL DOOM engine to compute the polygons needed for drawing the levels.

There are many DOOM ports that understand the GL-Nodes which glBSP creates, including: EDGE, the Doomsday engine (JDOOM), PrBoom, Legacy 2.0, Vavoom, Doom3D and ZDoomGL.

glBSP is integrated into EDGE (and 3DGE) by the original author of both glBSP and EDGE, Andrew Apted.