Hey Litst (and Hoborg), If you're able to beat that transparency problem, please share the solution. I was working on a helicopter some time ago and was using the wires function in the transparency channel to create a blurred rotor blade. This presented a problem with the distance fog in the scene - much like the chains in your illustration. I haven't been able to make any of the VL or atmospheric effects render properly when looking through a transparent object and I'd love to see a solution.