Oh, I forgot. Yes at least in the full version you can add your own content. How will depend on what it is and if it’s already in a poser native format or not. For native content just put it in the library. For other you use file>import. The only 2 formats I remember are obj and fbx but I know those aren’t the only ones. When I can look at poser I’ll list the others if no one else does first. 

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

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I use Poser 13 and win 10