Creating a beetle carapace shader in UE4?

Tweak_Squeak

Hi!
I'm making a dragon character and I was wondering how you would go about doing a beetle carapace look for the scales in PBR?
The techniques I've seen so far is faking the effect in handpainted reflection maps, but I was wondering if there was a workflow for using a shader in UE4.

Examples:

cupsster

You might want to try to use search function (top right of page) on forum before needlessly starting new thread as there is quite long one already. Contains example, math, screenshots, couple versions of shader and link to download. And no I wont link it for you.