I made these shoes (short boots) in Blender, Zbrush and Substance Designer. They work perfectly in iClone and CC3, but when I export my character to Unreal Engine, the surface of the shoes are flipped inside out. I am guessing that the export to Unreal is flipping the mesh maps. Please help! I am completely at a loss for what to do here. 

I have the complete Reallusion pipeline for Unreal Engine, all the correct plugins. I have a PC computer with an i9-9900kf chip, 32 GB of ram and a 2080ti GPU

75% of original size (was 667x19) - Click to enlarge

75% of original size (was 667x19) - Click to enlarge