Thanks for the interest about the subject.

Unfortunately i can't help about patching Povray or studying how obtain it with
mesh, it's out of my knowledge.

From what i understand, this kind of projection it's a de-facto standard,
for that reason i hope that Povray can support it 'by core', with some 'camera'
option, without patching or complex macro for users.

All VR player for VR headset (for example
http://riftinfo.com/list-of-oculus-rift-video-players-available) support ODS
format and PhotoSphere format, with or without stereo 3D (no stereo, stereo in
up/down, stereo in
side-by-side).

PhotoSphere format, like this:
https://plus.google.com/photos/105046045700292924505/albums/5805569422944253569/5805569421458305522?pid=580556942145830
5522&oid=105046045700292924505

Google docs: https://developers.google.com/streetview/spherical-metadata

From what i understand, it's the same identical equirectangular projection
without the Stereo.

If anyone of you can produce a simple Povray rendering (for example a simple
checked plane), i can test it by altering jpeg meta-data and testing it also in
VR headsets (i own Oculus DK2 and soon HTC Vive and Oculus CV1) to report
feedback.

Another stuff that can be interesting: modern VR headset need to works with 2K
display at 90fps.
It's currently difficult to create this level of ODS with the current
photographics tecnology, generally limited to 30fps that cause health ill in VR.
Can be very interesting, and maybe popular for Povray, to render some nice shot
or video with Povray and share it. There are lack of this kind of content out
there.
This is what i'm interested to do, render some of my POV-ray project in these
extreme resolution to share it to VR headset owner.

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