Looking through some old papers, I've enjoyed Klems' graphics showing direct to hemispherical transmission, plotted on a circular field of view. It's a quick way to compare how different coatings and shadings affect solar heat gain. I love the
BSDF viewer apps, and I can make the diagram manually from them. The old Window 6 Matrix Reader can do this from an XML file but in a less-preferred cartesian system. Is there something that can do this on a polar Klems patch diagram directly?