k3d/share/shaders/k3d_volcube.sl:213:    color  color_sum    = 0;
k3d/share/shaders/k3d_volcube.sl:267:		color_sum += clamp(cur_color,color 0, color 1);
k3d/share/shaders/k3d_volcube.sl:273:		color_sum = ( cur_color) * (1-density_sum) + color_sum;
k3d/share/shaders/k3d_volcube.sl:288:		color_sum = 1;
k3d/share/shaders/k3d_volcube.sl:301:    Ci = color_sum;
