Sorry, how do I get the V4 figure with maps into Blender? I tried exporting it as an obj but no materials came with it.

You'll have to apply everything using Blender's material commands, which I don't know. Unless there's a script that converts them, which I doubt, Blender isn't going to accept Poser's native material nodes. So, you'll have to learn how to use Blender's materials to make the effects you want to bake, essentially baking Blender's materials into texture maps instead of Poser's. I only mentioned Blender because it's free and it can bake materials, but only it's own. However, Carrara also can bake materials and it will accept some of Poser's native material nodes, IIRC. But, also IIRC, the scripts you need to use to back materials or fully import Poser materials are extra and are not free. (I haven't used Carrara in a very long time, so I wouldn't be aware of the capabilities of new versions of it. It might be able to do that sort of stuff as it is, out of the box, without the purchase of addition software for Poser integration/baking.)