Ive got a material code that applies mipmapping to my terrains. but i dont know if this is a pixel or vertex shader. here is the code :
Code:

---

 
function mtl_terraintex_init(){

// Adjust the texture transform to do some tiling of the textures
mtl.matrix11 = float(50);	// default u scale 
mtl.matrix22 = float(50);	// default v scale
}

material mat_terrain_detail
{	
	event = mtl_terraintex_init;
	
	effect = "
	
	matrix matMtl;
	
	texture entSkin1;
	
	technique t0
	{
		pass p0
		{
			Texture[0] = <entSkin1>;
			
			TextureTransformFlags[0] = Count2;
			TextureTransform[0] = <matMtl>;
			TexCoordIndex[0] = 1;

		}
	}";
}

action DetailTextures
{
	my.transparent=off;
	my.material = mat_terrain_detail;
}

 

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i have to know this because my game should also run on older gfx cards