k3d/share/shaders/k3d_fur2.sl:82:    float T_Dot_e = 0;
k3d/share/shaders/k3d_fur2.sl:119:	T_Dot_e = T.V;
k3d/share/shaders/k3d_fur2.sl:121:	Beta = acos(T_Dot_e);
k3d/share/shaders/k3d_fur2.sl:123:	Kajiya = T_Dot_nL * T_Dot_e + sin(Alpha) * sin(Beta);
