(stewer)> Quote - If you installed the 64bit version of Pro 2010 on a 64bit Windows, then everything except the library runs in 64bit, automatically.

Oh, this has changed since Poser Pro and I hadn't noticed.  So I just tried  clicking the camera-shaped render button and yep, it engages FFRender64.  A good change.  ^^

(Vestmann)> Quote - Hmmm, I'm using Vista 64bit and I'm having problems with rendering.  If I have separate process box checked or if use the background renderer I get the "FFRender Application has stopped working" message.  How can I see which renderer Poser is using?

I don't understand why the 32bit engine (FFRender) would be attempting to run.  Open the Task Manager (hold CTRL-Shift-Esc simultaneously)* and look in the processes tab for either FFRender or FFRender64.
  Anyone have an idea about Vestmann's situation?

*  Or mouse down to the task bar at the bottom of the screen, right-click to get a pop-up menu, and select Task Manager.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5