Sky (Source 2 shader)

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September 2025

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Sky is a shader in Source 2. Unlike Source, skies in Source 2 do not use a 6-sided skybox, but instead a single panoramic image, such as an HDRI map.

Todo:  Counter-Strike 2 supports 6-sided skyboxes, but it uses a single vtex_c instead of one for each face; how are these authored in the Material Editor?