Yes, I am thinking Unity, since the scene could be set up in Poser and exported for uptake into Unity. That is a proven flow. Leia's plugin for Unity looks smooth. It's just that a pipeline directly out of Poser in H4V would be one less layer.

The description of how the Leia Camera works is very cool. You see a three dimensional floating highlight called the Leia Fulstrum, for the full resolve-depth of the camera, with a convergence plan of sharp focus in blue. See attached image.

From Leia's published pdf:

LeiaCamera The LeiaCamera script component replaces the standard single Unity camera with a custom group of cameras that are automatically aligned to produce content for our displays. This array of cameras produce the individual views needed to create auto-stereoscopic content. The spacing between those cameras is called the baseline. Increasing baseline will always result in more depth/parallax, but too much baseline will produce uncomfortable and sometimes blurry images, so care must be taken so set this parameter properly.  

Leia Frustum: Leia’s SDK offers a visual guide for the depth settings in Unity: The convergence plane is drawn as a blue plane; A translucent region indicates the “safe” disparity region. Content in the Leia Frustum will have disparities bounded by a max value set at 5px by default.