How can I fix a "fractured/distorsioned" mesh?

Hi, when I import an FBX or OBJ to the Ue4, it looks like it has been fractured or something and I dont know how to fix it, I tried to flip faces export and import again but everything seem normal with the model.

What is the material setup? Looks like displacement could be through the roof

I dont think it has to much displecement, Its from a 3d scan made in meshroom, i mean the process from the scanning to the final result is alright, but the problem is when exported to Unreal Engine