textures/yourmap/sky
{
qer_editorimage textures/skies/sky.tga
q3map_skylight [amount] [iterations]
q3map_sun [R] [G] [B] [light] [heading] [elevation]
surfaceparm sky
surfaceparm noimpact
surfaceparm nomarks
q3map_nolightmap
skyParms textures/yourmap/sky x -
}