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Under the view tab, select Render in Cloud
This will then appear
Hit continue and you'll get this menu
Choose panorama, stereo panoram etc along with the other options.
Under the VRay tab, export the VR scene
It then exports VR Scene file to be rendered in V-Ray standalone or V-Ray cloud:-
https://docs.chaosgroup.com/display/VRAYREVIT/Render+Types#RenderTypes-ExportVRScene
Transform strip vertical image into equirectangular