How to save combined Octane render result ?

im using the classroom scene and wanted to try out an Octane ORBX VR render.
The classroom scene has multiple render layers and volumetric light.

When i hit the render button it renders 3 layers, but

a) the layers for volumetric light don’t follow the panoramic cubemap settings, how to get this corrected ?

b) where does it save the corresponding composited file ? I didn’t find that part out. If i Save Image, it saves only the last layer that’s visible.