There is an issue with blocks and shadows in technical mode:
Here windows as blocks:
Here window blocks exploded:
Included are blocks of windows only. You can have the entire file if you like though.
Also ground isnt working with shadows and if you move the plane I out in there you will see that the shadows move with it.
Good luck! 
blocks and shadows.3dm (1002.4 KB)
Technical_White_with_Shadows.ini (10.5 KB)