[Feature request] 6 individual files

[ctoLarsson]

Save the files as six individual files rather than one 3x2 merged file, as is required by for example Facebook's React VR.

[MateusZitelli]

For sure the 3x2 format is not the handiest, I will work on a multiple-file solution for both image and videos.

[jo-chemla]

+1. Also looking forward to the dev of the inverse transform (cubemap2equirectangular as developped in https://gitlab.eeecs.qub.ac.uk/40103899/BearThrills2.0/blob/13f1f9406c54a9d0c14940f08586eeb4fb78fe71/VisualisationSphereCube/PBR.cpp for example). And there seems to be a bug in the sampling, see attached. Should I create a new issue for this one?

[MateusZitelli]

Hi @jo-chemla, could you open another issue describing how can I reproduce such bug?