Hi soapy,
right click in the node graph panel and create a Render Target node, then right click and import your .obj or .abc node and connect to the Render Target mode to start create a new scene. Note that OctaneRender works in meters.
The preview configuration node is quite useless, better to have several Render Target nodes for different setup.
From all plugins is possible to export any scene with all the nodes already in place.
Please, download the demo scenes to have a rough idea on how the node system works:
http://render.otoy.com/downloads/Octane ... oSuite.zip
ciao beppe