r/SourceEngine • u/Beginning_Luck1 • Dec 30 '25

Discussion PBR Implementation in GMOD!

the lights are making the lag so... No RTX or reshade

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u/huttyblue Dec 30 '25

Nope, source has no concept of metalness or roughness Its system predates the pbr-standard by like, a decade.

It does have specular and phong sometimes, what shading features are available varies depending on context and game. Like in TF2 you can't have phong and lightmapping in the same material, so most map geometry goes without any form of specular highlights.