k3d/share/shaders/k3d_shadowspot.sl:16:	string shadowfile = "";
k3d/share/shaders/k3d_shadowspot.sl:31:		if( shadowfile != "" )
k3d/share/shaders/k3d_shadowspot.sl:32:		    attenuation *= (1.0 - shadow( shadowfile, Ps, "samples", samples, "blur", blur, "bias", bias ));
