k3d/share/shaders/k3d_uberlight.sl:32: *   nearedge, faredge - define the width of the transition regions
k3d/share/shaders/k3d_uberlight.sl:280:		       float nearedge, faredge;
k3d/share/shaders/k3d_uberlight.sl:305:  atten *= 1 - smoothstep(zfar, zfar + faredge, Pz);
k3d/share/shaders/k3d_uberlight.sl:375:		     0, faredge = 0;
k3d/share/shaders/k3d_uberlight.sl:458:      ShapeLightVolume(PL, lighttype, axis, cuton, cutoff, nearedge, faredge,
