BSPX

This article has no  links to other VDC articles. Please help improve this article by adding links  that are relevant to the context within the existing text.

Stub

This article or section is a stub. You can help by expanding it.

BSPX is a standard for adding new lumps to id Tech 2 and GoldSrc BSP files, which are used to add additional features to be used by source ports or custom renderers without breaking vanilla compatibility. As BSPX lumps are placed at the end of the BSP file, they are not loaded by vanilla engines, so a BSP with BSPX lumps is backwards compatible.