There are Poser tutorials here at R. Get an encoder tut on there, with a very clear why it has to be used, and a step by step example of how to do it. Provide link etc, and every vendor can refer to that tut.

That's the function of the tutorials section here. Not endless ways to hide limits of the renderer (app and person) by doing postwork.

I have tried prudent planning long enough. From now I'll be mad. (Rumi)