building_cubemaps

For building cubemaps, see Cubemaps - Building cubemaps section.

building_cubemaps is a console variable available in all Source games. This boolean cvar, when enabled, set HDR exposure to a consistent value, so you can build cubemaps without one cubemap texture looking brighter/darker than others. It will also disable env_sun.

Note:This console variable is flagged as "launcher"-only in Left 4 Dead and Left 4 Dead 2, so use the following command instead:
sm_cvar building_cubemaps 1 command (with SourceMod installed) or
script Convars.SetValue("building_cubemaps", "1") (using VScript).