Phong on brushes should work in Gmod, but I see no effect in game. Any idea what's wrong with the custom texture file?
||"LightmappedGeneric"
{
"$basetexture" "props/rubberfloor009a"
"$surfaceprop" "Rock"
"$bumpmap" "custom/rubber_greyscale_normal_brighter"
"$phong" "1"
"$phongexponent" "80"
"$phongmaskcontrastbrightness" "[2 .7]"
"$phongamount" "[4 1 1 1]"
"$phongtint" "[4.0 1.0 1.0]"
}||
The bump map does have a greyscale alpha channel (check the picture)