Question about textures

Can someone tell me how I can find out which HL2/CSS textures have these materials?

MAT_DIRT
MAT_GRASS
MAT_SAND
MAT_SNOW

If this is a nonsense question then I must not understand how this works, but I am trying to make a map for the Stranded gamemode for Garry's Mod and these are the materials that "foragable" textures must have. This is assuming that "materials" are, as I understand them, flags that you can give a texture to determine its sound and reflective properties.

Thanks in advance.

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Now remember kids. Asking questions is a good way to get censored by the government.

You can go here for a list of all the material surface properties in the Source engine: http://developer.valvesoftware.com/wiki/Material_surface_properties

If there are a few that may be specific to Garry's Mod, then you can find that game's own list in the scripts/surfacepoperties_manifest.txt file.

Surface properties are a part of the Valve material system, and usually denote the kind of sounds or particle effects (sparks, wood chunks) that material would produced when scratched or clanged against another material type. They don't specify how the texture will look, and for good reason; you can combine a surface type with other parameters to make something new or not real.

The parameter is simply kept in a texture's associated .vmt file and usually reads: "$surfaceprop" "metalvent"

Not all textures have surface properties, some are simply meant to be looked at.

Regardless though, the only way I would know to go on a mass hunt for which textures have those particular surface properties, would be to simply copy all the .vmt files out of the materials folder in the GM .GCF file, and filter out the ones with the obvious names ("metalgrate.vmt" obviously won't have any dirt, grass or snow in its properties). And then open all of them at once with notepad, and start clicking 'close' until I see what I'm looking for.

Unless there's a program that's available that can search though a list of txt files and filter out those files containing certain key words, surely this has been made!

But there is no list I know of, if that's what you're asking for. -Good luck!

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Blog: www.playingarchitecture.net
LinkedIn: Eric Lancon
Twitter:@Riven202

So do you think it would at least be logical? Meaning that textures that have a name implying dirt would have the MAT_DIRT and grass MAT_GRASS etc.(Although the gamemode, I assume, just needs one and not a specific type for any reason).

Thanks as well for explaining materials in Source. I am familiar with the GoldSrc system but couldn't understand the difference between the two. Also I hoped that Source would have a materials.txt or the like similar to GoldSrc's system so that I could just read a list of all the available textures that I could use for this kind of mapping.

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Now remember kids. Asking questions is a good way to get censored by the government.

I wanted to give you props for the Answer RIVEN but I don't see a way to do that. But this was a good question, when you start to make models for Source you have to deal with these properties in your models so they act accordingly.