Import fbx to maya ( Layered texture )

Hi. I’ve created a layered texture in Maya that contains two textures. For example, I wanted to create a wall with wallpaper texture with flowers combined with a dirty texture. It’s a lambert which contains two textures. One slot only.
The problem is when I import the object into unreal. It doesn’t import the textures and if I import it manually it still doesn’t work.
How can I import fbx to unreal in this situation?
Thank you!