My graphics card does support the shader used, I've reinstalled Gmod multiple times, and I've disabled all other addons except godhand, but I'm still having issues; Error log below.
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Failed to load sound "vo\heavy_meleedare03.wav", file probably missing from disk/repository
MDLCache: weapons\v_models\v_godhand.mdl needs to be recompiled
KeyValues Error: LoadFromBuffer: missing { in file materials/models/player/hvyweapon/hvyweapon_hands.vmt

Error: Material "models/player/hvyweapon/hvyweapon_hands" uses unknown shader "???E3???#?"
KeyValues Error: LoadFromBuffer: missing { in file materials/models/player/sniper/sniper_red.vmt

Error: Material "models/player/sniper/sniper_red" uses unknown shader "cH?R?>?=?΅>"
KeyValues Error: LoadFromBuffer: missing { in file materials/models/player/sniper/sniper_handl_red.vmt

Error: Material "models/player/sniper/sniper_handl_red" uses unknown shader "I@z?n>\??>?_???(>f??>"
Error: Material "models/player/sniper/sniper_blue" uses unknown shader "vmt"
ERROR: Compressed vertices in use but material does not support them!
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I've been trying to fix this for a while, has anyone got any tips?