used to place skyboxes. Applied to a brush to represent the sky. The actual texture shown during play is controlled by the map properties setting "Enviroment Map (
)". The default is
. Custom skies are normally added to the
folder and then selected in the map properties before compiling. You can find all the sky names that come with HL by looking in the
folder (for legacy WON installations, you will find them inside the
file which you can open with any software that is capable of reading Quake PAKs files like PAKScape).
SKY textures must be applied to visible faces while the rest can be textured with NULL.
Sky texture applied to brushes is treated differently during rendering. It does not generate extra wpoly's as normal texture does. Some tutorials tell you that it is good idea to use sky texture as a filler for large unseen areas, I have no evidence that this is a good method of reducing r_speeds, when the hint and skip textures are available.