Reality provides the integration of Poser with LuxRender.
Reality runs on both Mac OS and Windows, and it's compatible with Poser 9/Pro 2012 and above.
Reality automatically converts objects, materials, lights and camera from a Poser scene, including procedural nodes. Reality gives you the option to edit all the elements of a Lux scene and provides a fully-featured material editor that gives access to the advanced Lux materials, including procedural textures.
The free pose2lux exporter, initiated by snarlygribbly is still maintained and available. You can find more information in our forum.