Ok... On that room of mine I posted a bit below. I'm putting 3 lights right outside the window. 2 distant and one spot. All set to brightness 100% all pointing at the woman inside. I position my camera just outside the room to the side of the spot light looking in through the window. I get solid black, can't see anything inside. I switch to a camera inside that is set to show the window behind the woman. No light coming in and thus the woman shows up as a black outline against the window HOWEVER I can see the backdrop through the window just fine... I do a render with a third camera to the side of the woman showing mostly her backside. Thic camera is inside the room and angled to show those parts that you could see from outside. So considering that just outside I have three very bright lights I should get something... I get solid black. window is set to no color, trnasparency 100% and with 'no light interactions' checked. When I uncheck that the window turns a solid white in renders. Any idea why I can't get light to shine through a transparent object but can get the backdrop to show through?

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