very peculiar lighting

hey guys ive included the model and original picture and blend. im racking my head on how to get the glare thru thetop window and on to the beam…any thoughts are appriciated.

“Thorugh the top window and onto the beam?” I don’t follow you …

Light each part of the scene separately. “Layer-specific lights” (which “see” only objects in a certain layer and “shine on” only them) can be quite useful.

As can [i]compositing, which might enable you to reduce this problem into two separate problems.