hl2_ep2_content/materials/dev/dev_materialmodify.vmt

"LightmappedGeneric"
{
	"$basetexture" "Dev/water_normal"
	"$surfaceprop" "water"
	"Proxies"
	{
		"MaterialModify"
		{
			// fixme!  This has to be here, or material loading barfs.
			"dummy" 0
		}
	}
}