Refections on separate layers/objects in BI


I Have two reflective boxes on separate layers.
I also have one mesh plane that produce a reflective gloss on each layer/box

Problem is that both reflective planes shines on both layers.
How can i control so that each layer only has its own reflective mesh plane?

There’s no problem doing it in Cycles but for this i need to do it in BI.
Does anyone know how to set this up in BI?

As you can see from the bottom picture, the reflective mesh from layer Front also shines on layer Back :frowning:
How to control those separately?


Glossy-BI.blend (535 KB)

Anyone please, i’m stuck :mad: