The image on the right shows direct sunlight being cut off by blinds (which are incorporated through proxy geometry). You can find the entire example in Section 9.1 (https://www.radiance-online.org/learning/tutorials/matrix-based-methods) . This document is somewhat out-of-date because it does not include aBSDFs but you should be just able to change
BSDF to aBSDF (radTutorialFiles/room/blinds/blindsWithProxy.rad at main · sariths/radTutorialFiles · GitHub )when defining your preforated shading screen with proxy materials.
The rationale for using proxy geometry is described in this conference paper : Validation of the Five-Phase Method for Simulating Complex Fenestration Systems with Radiance against Field Measurements | Building Technology and Urban Systems . I don’t know how much of this functionality has actually been ported into Honeybee ( @mikkel will be the right person to answer that).
Regards,
Sarith