Thanks for the caring words, @Islarch .
For either of the two shade benefit components (comfort benefit or energy benefit), there are no bounces considered in the analysis at all. Essentially, sun vectors are just shot out from a bunch of points on the bus stop bench or window and the component checks to see if they intersect the context shade, in which case they are ignored. If they don’t hit the context shade, then the component checks to see if it hits a cell of the analysis mesh that is being evaluated for benefit. If it hits the mesh, the “value” of the sun vector (either degrees from comfort or cooling/heating energy) is added/subtracted from the benefit of that cell.
Here’s the paper that outlines the methods used in the comfort shade benefit component:
And here’s the original paper for the energy shade benefit, which the comfort component borrows a lot of its methods from:
http://www.ibpsa.org/proceedings/BS2011/P_1209.pdf
You’ll see that both papers note the lack of bounces as a limitation.