<!-- This file defines a series of phase function instances to be tested for consistency. This is done using the testcase 'test_chisquare' --> <scene version="0.3.0"> <!-- Test the isotropic phase function --> <phase type="isotropic"/> <!-- Test the Henyey-Greenstein phase function configured as highly forward-scattering --> <phase type="hg"> <float name="g" value="0.9"/> </phase> <!-- Test the Henyey-Greenstein phase function configured as slightly backward-scattering --> <phase type="hg"> <float name="g" value="-0.3"/> </phase> <!-- Test the micro-flake phase function --> <phase type="microflake"> <float name="stddev" value="0.1"/> </phase> </scene>