Radiance: Concave buildings beam convergence effect

Hi guys,

I would like to simulate the effect of reflections of beam solar irradiance and concentration due to concave aspect of a facad (as for the 20 Fenchurch Street building in London).

I read this post on the same subject: http://www.radiance-online.org/pipermail/radiance-general/2008-Marc...

But I don't understand exactly how to assign the materials to the surface.

When I use the Honeybee_CreateHBSrfs component it gives me an error:

1. Solution exception:Faild to import void glass glass_alt_mat
0
0
3 0.96 0.96 0.96

void brightfunc glass_angular_effect
2 A1+(1-A1)*(exp(-5.85*Rdot)-0.00287989916) .
0
1 0.08

glass_angular_effect mirror glass_mat
1 glass_alt_mat
0
3 1 1 1

Have you ever solved the same issue? If possible, how would you simulate this effect with Honeybee?

Any help would be appreciated