k3d/share/shaders/k3d_hextile.sl:11: *    mortar underneath it.  Finally, there is scuffing due to people's
k3d/share/shaders/k3d_hextile.sl:55:	 float scuffing = 0.5;
k3d/share/shaders/k3d_hextile.sl:114:  scuff = scuffing * smoothstep (.6,1, noise(t*scufffrequency-90.26,
