k3d/share/shaders/k3d_eyeball.sl:67:  color Cball, Ciris;
k3d/share/shaders/k3d_eyeball.sl:103:      Cball = mix (eyeballcolor, bloodcolor, smoothstep(0,.75,displayed));
k3d/share/shaders/k3d_eyeball.sl:105:  else Cball = eyeballcolor;
k3d/share/shaders/k3d_eyeball.sl:123:  Ct = mix (Ciris, Cball, irisstat);
