Quote - Im implying that if you have an Env. sphere at a scale around the 5000-7000 mark, camera positioning is restricted due to the small size of the env. sphere. this is handy for accurate reflections with some spheremaps. I thought this was what stewman meant

I still don't understand what you're saying. 5000-7000? Do you mean percent of original scale? That depends on the object size you're starting with.

My Environment Sphere at 100% is 1500 feet in diameter. Stewman said  "I love BB's environment sphere and I used it all the time, but it requires too small a camera focal length for some renders." He didn't say what problem he's solving with the smaller focal length. Most people are referring to pixellation when they complain of focal-length related problems with an environment sphere. They're usually not referring to perspective or ability to move around.

What is needed for high-res high-focal length images rendered inside a sphere is a high-res equirectangular image - something like 20K by 10K.

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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)