Both commands are currently unfunctional in Counter-Strike: Global Offensive. Using either of the commands will result in the material to turn completely black in-game. Examples are detail props and particles who extensivly used these commands in older versions of the Source Engine, which now cannot use these anymore, resulting in the dissapearance of these entities.
For HUDs in Garry's Mod, the parameter
$vertexalpha is needed in order to make the alpha parameter of
To do: Are these commands shader-agnostic?