Yes, converting materials sometimes takes work. But once I figured out Octanes nodes, I now know it's possible to layer tattoos, etc, on skin, through the Material Mix node, it works just like Poser's Blend node. Most things in Poser can be done in Octane, ya just hafta use yer noodle and do sum figurin' out.

                                                                                                                    

Poser 10

Octane Render

Wings 3D