k3d/share/shaders/k3d_graphic_lines.sl:40:        float brightness_paint=0.3;
k3d/share/shaders/k3d_graphic_lines.sl:211:	illumination_paint=(illumination_paint*contrast_paint)+(1.0-contrast_paint)/2.0+(brightness_paint-1.0)+n_paint*randomness_paint;
