I use genBSDF to generate the BSDF for a prism. However, it produced some unexpected direct hemispherical transmittance values that are greater than 100%. Even when I add the ‘-dim’ options, the unexpected values are still present.
Fig.1 The geometry of the prism
Due to the substantial thickness of your system, you should specify more than one prism width in your -dim setting, otherwise you will lose light in some directions and concetrate it in others.
I recommend that your width and height dimensions be at least 20x your depth for a transparent system such as yours. You may need to enlarge your model to accommodate this simulation. Alternatively, you could reduce your model’s depth without affecting the BSDF.
