I know you won't believe me, but here is an indoor equirectangular image mounted on my environment sphere. I did not do any tricks to fool you.

I scaled the sphere to different sizes and rendered each, mixed them up, and assembled them into one image. No modification was done to each - I simply copied them. Click for full size.

One of them the sphere was 10 feet in diameter, so the surface is just 5 feet from the camera.

One of them is at the original size of 750 diameter, so the surface is 750 from the camera.

One of them is scaled to a mile in diameter!!

Which is which?

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)