In Game Surface Types

Note: The in game surface types are not the same as the search keywords material types.

The surface type for a shader is specified via a "surfaceparm type" line, where type is the surface type to use.

Example:
	surfaceparm wood
	
Note that only one surface type can be used at a time, and so only one should be specified in a shader.

Here's a list of each of the surface types that can be specified:
	wood	- wooden surface
	metal	- metal surface (like metal plating)
	stone	- stone or rock surface
	dirt	- dirt surface
	grill	- metal grill surface
	grass	- grass covered surface
	mud		- muddy or squishy sounding surface
	puddle	- water puddle surface
	glass	- glass surface
	gravel	- rocky gravel surface
	sand	- sandy surface
	foliage	- tree tops, bushes, or leaf covered surface
	snow	- snow covered surface
	carpet	- carpeted surface
