Plotting Surface Particulate (Mie) Scatter
As of FRED v9.110, the BSDF plot routines ignore user-selection of “Apply on Reflection” or “Apply on Transmission”. For most scatter models there is no difference in the BSDF values and so there is no need for designation of a plot in transmission or reflection. However, the Surface Particle (Mie) Scatter model is a volume effect having scatter components both forward and backward that must be accounted for in a plot of the BSDF.
The FRED file included with this knowledge base article has an embedded script which writes out BSDF data to Microsoft Excel for plotting and accounts for application of the model in transmission or reflection.
Download the FRED file: miePlottingExcel.frd