textures/common/hint // should NOT use surfaceparm hint.. strange but true
{
	qer_nocarve
	qer_trans 0.30
	surfaceparm nodraw
	surfaceparm nonsolid
	surfaceparm structural
	surfaceparm trans
	surfaceparm noimpact
}

textures/common/invisible // solid, transparent polygons, casts shadows
{
	surfaceparm nolightmap			
        {
                map textures/common/invisible.tga
                alphaFunc GE128
		depthWrite
		rgbGen vertex
        }
}