k3d/share/shaders/k3d_causticlight.sl:13:               float  threshold = 0.5;
k3d/share/shaders/k3d_causticlight.sl:28:	    caustic = smoothstep (threshold, 1, caustic);
k3d/share/shaders/k3d_fractal.sl:15:k3d_fractal(float H = 0.8, lacunarity = 2.5, octaves = 7, offset = 0.9, sharpness = 4, threshold = 12, Kt = 0.1)

k3d/share/shaders/k3d_fractal.sl:43:          		weight = signal * threshold;

k3d/share/shaders/k3d_imagelayerclouds.sl:9:			     float threshold = 0.5;)
k3d/share/shaders/k3d_imagelayerclouds.sl:33:  Ct = mix(skycolor, cloudcolor, smoothstep(threshold, 1, value));
k3d/share/shaders/k3d_luna.sl:40:		 float highland_threshold = -0.2;
k3d/share/shaders/k3d_luna.sl:86:  if(chaos > highland_threshold)
k3d/share/shaders/k3d_mysky.sl:11: *    on a bright sunny day.  Works as a basic thresholded fBm.  Since

k3d/share/shaders/k3d_mysky.sl:21: *    threshold - fBm sum below this level is just blue sky

k3d/share/shaders/k3d_mysky.sl:56:	     float threshold = 0;

k3d/share/shaders/k3d_mysky.sl:76:  Ct = mix (skycolor, cloudcolor, smoothstep (threshold, 1, value));

k3d/share/shaders/k3d_puffyclouds.sl:9: *    on a bright sunny day.  Works as a basic thresholded fBm.  Since
k3d/share/shaders/k3d_puffyclouds.sl:19: *    threshold - fBm sum below this level is just blue sky
k3d/share/shaders/k3d_puffyclouds.sl:53:	     float threshold = 0;
k3d/share/shaders/k3d_puffyclouds.sl:73:  Ct = mix (skycolor, cloudcolor, smoothstep (threshold, 1, value));
k3d/share/shaders/k3d_ridged_multifractal.sl:15:k3d_ridged_multifractal(float H = 0.8, lacunarity = 2.5, octaves = 7, offset = 0.9, sharpness = 4, threshold = 12, Kt = 0.1)

k3d/share/shaders/k3d_ridged_multifractal.sl:43:          		weight = signal * threshold;

k3d/share/shaders/k3d_rustymetal.sl:6: *   is basically thresholded turbulence (summed abs(snoise)).  Where it's
k3d/share/shaders/k3d_skin1.sl:22: * blemishfreq, blemishthresh,blemhishopac = control the freqency, threshold and opacity
k3d/share/shaders/k3d_skin1.sl:29: * poresfreq, poresthresh poresdepth = control the frequency, threshold and depth of the
