Blender to Unreal, Root UV or work around?

I’m wondering if it’s possible to get Root UV information out of Blender and into UE4 as I would like to be able to colour the fur based on the colour of the texture underneath. so far I cannot find any information on how to do this, nor any kind of way to produce the same result. i don’t know if it’s just my inexperience with this system, but it would seem odd if you can only do this with XGEN.

hopefully this can be fixed in the future, or if it will be possible for unreal to obtain this information. not being able to do this appears to make it impossible to do specifically patterned fur based on a characters design.