k3d/share/shaders/k3d_ceramictiles.sl:86: * features include: (1) mottling of the color; (2) darkening or shifting
k3d/share/shaders/k3d_fur2.sl:80:    float clump_darkening = 1.0;
k3d/share/shaders/k3d_fur2.sl:86:    float darkening = 1.0;
k3d/share/shaders/k3d_fur2.sl:127:	    clump_darkening = 1 - ( clump_dark_strength * 
k3d/share/shaders/k3d_fur2.sl:130:	    clump_darkening = 1.0;
k3d/share/shaders/k3d_fur2.sl:139:	Cspec += (1-nonspecular) * SpecularColor * clump_darkening * 
k3d/share/shaders/k3d_fur2.sl:143:	Cdiff += clump_darkening * fnc_diffuselgt(Cl, L, norm_hair);
k3d/share/shaders/k3d_fur2.sl:146:    darkening = clamp(hair_col_var, 0, 1);
k3d/share/shaders/k3d_fur2.sl:148:    darkening = (1 - (smoothstep( var_fade_end, var_fade_start, 
k3d/share/shaders/k3d_fur2.sl:149:				  abs(luminance(Kd*Cdiff))) * darkening));
k3d/share/shaders/k3d_fur2.sl:151:    final_c = mix( rootcolor, tipcolor, v ) * darkening;
k3d/share/shaders/k3d_superplank.sl:100:  float ring;			/* 1 in a ring darkening, 0 where not */
