As for now, I don't have any UE4 material graph. My partner is learning how to use UE4, I don't even own it myself (which will cause some lovely troubles if I have to check things out). I'll contact him about the material graph. Does it matter if the transparency doesn't show up in blender for UE4?
Are you trying to make this model for UE4? If so what does your UE4 material graph look like? Materials in general do not export well, you will usually have to build a material graph inside Unreal Engine in order for it to look right.
Oh quick sidenote, I would prefer if I can fix it without cyclus. I know that cyclus node is made for realistic rendering and I've heard it's very hard to export cyclus materials to UE4 because it's an entirely different thing.
Just an FYI, Unreal Engine 4 is free, you can go download it whenever you feel like it. Nope. The way Unreal and Blender render materials is totally different, afaik it is not possible to get an accurate result (as in something that will look the same in UE4) out of Blender because it does not use PBR (although some…