Regarding the request to add AMD ProRender for GPU rendering on AMD cards too, you can already get the Reality plugin for Poser, that renders via Luxrender 1.6 on AMD cards: https://www.renderosity.com/mod/bcs/reality-4-3---poser-edition/107744/

Would be nice if the new owners could help Preta3D somehow, in order to get the plugin updated to the latest Luxcorerender instead.

Poser 11 just needs an update of Superfly from its source Cycles, which has AMD OpenCL support in the newer versions.

/Edit. AMD Prorender may be better than Superfly or Luxcorerender, but another new render engine in Poser adds complexity for everyone...