Lighting through glass walls in archicad?

[Sambo]

Hi

 

This is my first post, and hopefully its in the right place!

 

Ive been trying to figure out how to get light to light objects through a layer of glass in archicad, (using lightworks) but can't work it out and can't find an answer any where! Any help would be great.

 

I have attached a pic of my project to better explain what im trying to do as you can see the exterior lightling does not pass through the glass wall onto the underside of the boxes inside the building, is there any way of getting it to do this, maybe theres a way of turning off the shadows cast by the glass wall?

 

Cheers for you time