Poser's camera are sometimes so difficult to retrieve, especially if the scene has many objects.
Here's a trick I use when I have difficulties to retrieve it, often because of the presence of an object that could turn the rendered picture black.

It's all summed up in this image:

- make the aux camera the active one
- turn on the display of the cameras (hierarchy window), and make the main camera visible, this will select it as well
- menu: display > object > cartoon
- if you still don't see it: frame the said cam

𝒫𝒽𝓎𝓁

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(っ◔◡◔)っ

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