Yea i get you, tried it, but it still seems that AE ignores the fact that a solid is blocking the light: if i make a cube of solids, and put the light inside it, objects outside the cube which logically should have no illumination are illuminated as if the walls enclosing the light werent there…
Casting shadows helps to some degree but only if the shadow falls directly onto the outside layer.
Guess i’ll have to finally admit that not everything can be done in AE 🙁