k3d/share/shaders/k3d_brushedmetal.sl:9: *   uroughness, vroughness - separate roughnesses for u and v directions
k3d/share/shaders/k3d_brushedmetal.sl:22:			 float uroughness = 0.15, vroughness = 0.5;
k3d/share/shaders/k3d_brushedmetal.sl:27:    MaterialBrushedMetal(Nf, Cs, Ka, Kd, Ks, normalize(dPdu), uroughness,
k3d/share/shaders/k3d_brushedmetal3.sl:53:		float uroughness = 0.35, vroughness = 0.2; 
k3d/share/shaders/k3d_brushedmetal3.sl:61:                                          xdir, uroughness, vroughness);
