Sbsp

sbsp = Scenario Structure BSP

Editing the Tag

You can use Eschaton to edit the tag's metadata and references.

Reference Swapper

A bunch of shader and bitmap references, followed by:

rain 

Select a weather environment for this map.

wind 

Select a wind environment for this map (interactive with flags and contrails, possibly also with skies).

lsnd 

Change the background music or sound for this map.

snde 

Change the sound environment, in other words, what environment it sounds like you are in (ie, forest, alley, cave, mountains).

These are then followed by more effective references of bitmap and shader environment tags.