I have a serious problem with CS:GO skybox. No matter which texture I use as a skybox, this always apears. This wierd light on the sky is the reason of light_enviromental entity,
Only Tool Textures are Missing in Hammer++ L4D2 : r/hammer
Source 1] Hammer Tutorial V2 Series #16 "Adding Fog to Your Level" - YouTube
Optimizing An Open Map in Source Engine - Development - Mapcore