The Scattering Domain feature now has a new Scatter option in the Effect on primary ray list in the Scattered and Absorbed Rays section, which can be used to trace the rays scattered by the particles in the medium. When you choose the Scatter option, you can either select Henyey–Greenstein, which is typically used for the asymmetric scattering, or Rayleigh, which is usually suited for small particles from the Scattering phase functions list.

The Transmission coefficient t field has been added in the Absorption Coefficient section of the Mirror, Wall, and Illuminated surface features. This field allows you to specify the transmission coefficient in addition to the reflection and absorption coefficients, enabling more accurate intensity and power computations at reflective boundaries.

You can now take into account the reduction of the intensity and power of the reflected rays due to surface roughness using the Raleigh roughness option (from the Surface roughness model list in the Surface Roughness section). This section is available in the Mirror and Wall features when ray intensity or power are computed. In the Wall feature, this new section appears when Specular reflection is selected from the Wall condition list in the Wall Condition section.

A new checkbox called Release inside graded and dissipative medium appears in the Ray Direction Vector section of the release features when