I was meaning more fully compatible in terms of being able to load actual Poser Scene files. Does it support any kind of rigging system?  It still is nice to know that there could be some level of compatibility at least.  

It's compatible in that it takes any .obj file (and will take .rib files soon). You would setup your scene in Poser and export an .obj file and then import that into Octane. Octane only lets you adjust lighting and textures. Everything else has to be done in your main program of choice (like rigging). It's just an interactive unbiased photo real render engine that uses the GPU, CUDA cores and memory of an Nvidia card - regular graphics or Tesla, not a new 3D software program.