HDR is way too intense when viewing the map in Gmod. In HL2, the lights look way better. I tried lowering the HDR brightness but it just made the environment darker, but
Steam Community :: Guide :: How to do a "Full Compile"
Make Your Source Maps Glow with Cubemaps and HDR – LambdaGeneration
Interlopers.net - Half-Life 2 News & Tutorials
Weird Lighting bug in hl2(hdr disabled) same with hdr on. : r/hammer
Advanced HDR - Valve Developer Community
Hammer Editor (CSGO) environment_lighting is not lighting up the whole map. : r/hammer
Hammer) Skybox/ lights are too bright? - Knockout!
Steam Community :: Guide :: The Big Amazing Guide to Lighting!
Adding Light - Valve Developer Community
Make Your Source Maps Glow with Cubemaps and HDR – LambdaGeneration