Octane is a GPU render engine (see https://home.otoy.com/render/octane-render/features/)

The Octane Plugin for Poser is an addon for Poser where you can export your scene to the Octane render engine avalable at Otoy as well.

Creating a VR is simple an output option.

You create your 3d scene in Poser, then start the plugin (it ia a poser addon), adapt some materials if you want to, and render it,

Export settings for Oculus would be Panoramic camera, cube map projection, Stereo Output Side by Side, output dimension: 18.432x1.536

Since you need both the Octane Render engine and the plugin, it is not a cheap, but it is a solution

Here is a link to a gallery: https://render.otoy.com/vr_gallery.php