I finally got around to setting up the wing materials. As well as being a bumpy transparent material I wanted to get that colourful rainbow high light effect like a lot of insect wings have. But it's only visible when it's reflecting. It was as easy as adding the desired colours into the reflection map. I'm rendering some turnaround videos so here is a few stills from it. I'm yet to setup the wing "bones?". I may also add some body hair / fuzz.