So I just grabbed and OBJ with a .mtl file that had all of the maps in the same folder but none of the maps came into Tranmutr. Not sure why Evermotion would do this but they setup their maps paths in the mtl to be absolute and not relative.
But it made me think - can we get a option or utility that will look in the same folder or a designated folder for missing maps in order to remap everything that might be missing?