k3d/share/shaders/k3d_graphic_lines.sl:28:        float fuzz_highlight=0.3;
k3d/share/shaders/k3d_graphic_lines.sl:151:	float val_highlight=(smoothstep((stripemin_highlight)-(fuzz_highlight),(stripemin_highlight),(tt_highlight))-smoothstep((stripemax_highlight)-(fuzz_highlight),(stripemax_highlight),(tt_highlight)));
