Hi,
I rigged a custom character via Mixamo and loaded it in 3DXchange v7.81. I then followed a tutorial on converting the said character to Non-Standard, and then I applied it to iClone. The materials/textures of the character are still okay at this point. 
It was when I loaded the exported FBX (from iClone) in Unreal, did the character looked messed up (animation was working fine though). The materials/textures are all over the place and the material assignments are all wrong. I also tried loading it in Blender and other 3D softwares and they yielded the same look. 

I have tried embedding the textures from 3DXchange before applying to iClone but it yielded the same result. I've also tried unlinking all textures in iClone.

All my Reallusion softwares are up-to-date. 

I will attach photos of my character when in iClone and when imported in other 3D softwares. Thanks in advance for any help.