k3d/share/shaders/k3d_background.sl:30:  Ci += (1 - alpha) * bgcolor;
k3d/share/shaders/k3d_background.sl:32:  alpha = 1;
k3d/share/shaders/k3d_bluescreen.sl:26:	Ci+=(1-alpha)*  tex;
k3d/share/shaders/k3d_bluescreen.sl:29:       Ci+=(1-alpha)*background;
k3d/share/shaders/k3d_clamptoalpha.sl:2: * clamptoalpha.sl -- imager shader that forces Ci to be non-negative
k3d/share/shaders/k3d_clamptoalpha.sl:3: *    and with each component to greater than the alpha value of the
k3d/share/shaders/k3d_clamptoalpha.sl:8:k3d_clamptoalpha()
k3d/share/shaders/k3d_clamptoalpha.sl:10:  Ci = clamp(Ci, color(0, 0, 0), color(alpha, alpha, alpha));
k3d/share/shaders/k3d_decalplastic.sl:42:			float alpha = float texture(texturename[3], ss, tt);
k3d/share/shaders/k3d_decalplastic.sl:43:			Ct = (1.0 - alpha) * Cs + (alpha * color texture(texturename, ss, tt));
k3d/share/shaders/k3d_gooch.sl:15: *  alpha        : Gooch cool color factor
k3d/share/shaders/k3d_gooch.sl:30:         float alpha = .25;
k3d/share/shaders/k3d_gooch.sl:45:    kcool = blue + ( Cs * alpha);
k3d/share/shaders/k3d_orennayar.sl:50:    float alpha, beta, sigma2, cos_phi_diff;
k3d/share/shaders/k3d_orennayar.sl:63:	alpha = max (theta_i, theta_r);
k3d/share/shaders/k3d_orennayar.sl:68:	    C2 *= sin(alpha);
k3d/share/shaders/k3d_orennayar.sl:69:	else C2 *= (sin(alpha) - pow(2*beta/PI,3));
k3d/share/shaders/k3d_orennayar.sl:70:	C3 = 0.125 * sigma2 / (sigma2+0.09) * pow ((4*alpha*beta)/(PI*PI),2);
k3d/share/shaders/k3d_orennayar.sl:72:				  (1 - abs(cos_phi_diff)) * C3 * tan((alpha+beta)/2)));
k3d/share/shaders/k3d_softboxes.sl:152:		uniform float alphaChan;
k3d/share/shaders/k3d_softboxes.sl:154:		    alphaChan = 0;
k3d/share/shaders/k3d_softboxes.sl:156:		    alphaChan = 3;
k3d/share/shaders/k3d_softboxes.sl:158:		ot = float texture(boxTexture[alphaChan],theS,theT,
k3d/share/shaders/k3d_supertexmap.sl:5: *    Apply a texture map (possibly with associated alpha) 
k3d/share/shaders/k3d_texblender.sl:24:    float alpha;
k3d/share/shaders/k3d_texblender.sl:27:            C = ReflMap (envname, P, blur, alpha);
k3d/share/shaders/k3d_texblender.sl:29:            C = Environment (envname, envspace, envrad, P, R, blur, alpha);
k3d/share/shaders/k3d_texblender.sl:34:    color Cray = RayTrace (P, R, Kr, sqrt(blur), rayjitter, raysamples, alpha);
k3d/share/shaders/k3d_texblender.sl:35:    C = Cray + (1-alpha) * C;
