Background Map Support
Background maps are maps displayed as a backdrop for the menu. A similar system can be found in Half-Life 2. Xash3D provides a simpler system: the choice of map doesn’t depend on the completed episodes (because there is no episode tracking in Half-Life), but occurs randomly based on a list you provide.
The file listing the background maps must be named chapterbackgrounds.txt and be located in the scripts directory (if the directory doesn’t exist, create it). Each new map name must be on its own line. Example:
c1a1a
c2a1
c4a3
c2a5
c0a0
Any map can be used as a background, but using maps where the player rides a monorail train is not advised, because the result may look unappealing.