Reflections are quite easy to set up in poser super fly and can be done with limited nodes. Here is a simple render with 3 planes as mirrors, a pyramid for something to reflect, and an environment sphere for an environment and to help with lighting.

Here is the scene setup. There's one point light off to the side

And here are the shaders I used for the 3 mirrors going from left to right in the scene

As you can see, none are complicated. The most involved was the Firefly one. None include masks. If you want those, it does go beyond basic so there will be a few more nodes depending on which root node you want to use but is still not to the point of being difficult.

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