Billboard Image Transparency Problems.

Hello All!

I am building a game made up of sprites that I am making outside of UE4 and importing. I am having problems when turning these sprites into Billboards however in the Blueprints Editor. It seems to be messing up the alpha channel when rendering as a billboard. Anybody know what is going on here? I am using GIMP and have tried exporting as PNG, PSD, and TGA.

On the left, the imported image as a sprite, on the right, the same image but rendered as a billboard, not the horrible alpha!

​​​​​​​Please help me!