The angular distribution associated with this model may be viewed using the example file HG-angular.zmx, also found in the .ZIP file located at the end of this article. In this file, a Source Ray is again used to launch 5,000,000 rays (with a total power of 1 W and a transmission of unity) at normal incidence onto a volume on which the Henyey-Greenstein distribution has been applied. The source has been set up such that each incident ray is only scattered once from the volume. The mean free path is set to be small relative to the thickness of the volume, and the maximum scattering angle is 180 degrees. The radiant intensity distribution in then measured on a large detector placed 4 mm away from the front of the scattering volume. For g = 0.001, the distribution is uniform, as expected:



For g = 0.5, the distribution is much more peaked:



Results from this ray trace can be saved into a file by clicking on the Text button in the Detector Viewer menu bar, and then clicking under Window > Save Text in the menu bar of the Text output:



These results can then be compared to the theoretical model for the probability distribution, which shows excellent agreement: