Note that the thin occluding object is in exactly the same position in all 3 images.
The first image is a Phong material (non-SSS) reference.
The red material is defined like so, and the white material similarly, except that all absorption RGB coefficients are 10.
Code: Select all
<medium>
<name>subject_medium</name>
<basic>
<ior>1.3</ior>
<cauchy_b_coeff>0.0</cauchy_b_coeff>
<absorption_coefficient_spectrum>
<rgb>
<rgb>10 100 100</rgb>
<gamma>1</gamma>
</rgb>
</absorption_coefficient_spectrum>
<subsurface_scattering>
<scattering_coefficient_spectrum>
<rgb>
<rgb>10 10 10</rgb>
<gamma>1</gamma>
</rgb>
</scattering_coefficient_spectrum>
<phase_function>
<uniform/>
</phase_function>
</subsurface_scattering>
</basic>
</medium>
<material>
<name>subject_mat</name>
<glossy_transparent>
<internal_medium_name>subject_medium</internal_medium_name>
<exponent>
<constant>
100
</constant>
</exponent>
</glossy_transparent>
</material>
