shedofjoy:

Short answer: no you don't need to make another one if you move the camera.

You do need to make another one of you move (rotate) the environment sphere or any significant 3D objects big enough to influence the ambient lighting in a big way. Little things, like a tree or a fountain won't influence it. Even a big thing, such as a house, will only matter if it is really close to your subject.

I have to take apart your question, though, because the answer I'm giving is not caused by the reason you were asking about.

"If the IBL image is matched to the background of the EnvSphere do i need to make a new IBL image everytime i move or rotate the camera ..."

No.

"or does poser take this into account and the IBL is rotated also to give a correct lighting in the scene"

Here's where the wheels fall off. The answer to this is also no.

You presented the question as an either/or, with an expectation that I could answer YES to at least one of the elements of your question. But what you said in the second part is also false and the answer is no to both parts of your question.

No you don't need to make a new IBL image.

No it does not rotate to give correct lighting.

The reason the lighting remains correct is because it DOES NOT ROTATE at all. If the IBL rotated with the camera, then it would become wrong as soon as you moved the camera, which is what you're trying to avoid, but your reasoning would have PRODUCED the problem instead of avoiding the problem.

I hope I'm being clear - when a question is fuzzy like this, the answer may be more confusing than helpful.

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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)