I just had to try combining that "Rendering single faced polygons differently on the back facing side" with translucence. Two infinites with ray-traced shadows, one in front, one behind;  a one-sided transmapped leaf with its front facing to the front; an upward pointing thingy in front of the leaf, and a downward pointing thingy behind.Here are my results:

So I've clearly got something messed up with the back-lit back-viewed part of it.

Here's the shader I cobbled together. Obviously I've made a mistake somewhere - or maybe it just can't be made to work?:

What puzzles me most is that it's NOT the back-lit front-viewed part that's wrong - so the translucence seems to working correctly to bring the back lighting to the front view.

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.

*also available in ShareCG, DAZ, and HiveWire3D flavours (the DeviantArt and CGBytes flavour have been discontinued).