HB Shades on HB energy Models


I am attempting to analyse the impact of a shading system with slits on the solar gains and daylight within a Box Model. The fixed external shade is 50mm thick and has slats at spacing of 50mm (with 50mm gaps). On assigning the shades to the Box model using HB add shade component, the geometry does not seem to work as well as expected. I have attached a screenshot of the modelled BREP and the result of the HB Visualise by type.

My guess is that this is because 50mm wide slits are too small to be added into the energy model? I have checked and the geometry itself has no issues, and is composed of closed polysurfaces.