Portal Sky List

This is a list of skies available in the Steam caches, along with pictures of each skybox. The light_environment settings listed (Ideal Sun Angle, Ideal Brightness, etc) are suggestions based on settings used in official maps; other values may also be appropriate. To test skies in singleplayer without recompiling the map, bring up the console and enter sv_skyname <sky_name>. Quicksave the game, load it again and the old skybox should be temporarily replaced with the new one.

These skyboxes are available to Portal and mods utilizing its content. Portal also contains all Half life 2 skies.

bts_custom_cubemap
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sky_escape_01_
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
escape_01	N/A	N/A	N/A	N/A	N/A	N/A	N/A
sky_day01_05_hdr
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
escape_02	0 122 0	-45	249 245 202 900	192 221 226 200	-1 -1 -1 1 (.7)	-1 -1 -1 1 (.7)	0
sky_wasteland02
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
background1 testchmb_a_00 testchmb_a_01 testchmb_a_02 testchmb_a_03 testchmb_a_04 testchmb_a_05 testchmb_a_06 testchmb_a_07 testchmb_a_08 testchmb_a_08_advanced testchmb_a_09 testchmb_a_09_advanced testchmb_a_10 testchmb_a_10_advanced testchmb_a_11 testchmb_a_11_advanced testchmb_a_14 testchmb_a_14_advanced testchmb_a_15	N/A	N/A	N/A	N/A	N/A	N/A	N/A
sky_day01_01
Example Map	Ideal Sun Angle	Ideal Sun Pitch	Ideal Brightness	Ideal Ambience	Ideal HDR Brightness (Scale)	Ideal HDR Ambience (Scale)	Ideal Sun Spread Angle
background2 escape_00 testchmb_a_13 testchmb_a_13_advanced	N/A	N/A	N/A	N/A	N/A	N/A	N/A