[UF_Shoki]

Note that some G4M2-A had the antenas for anti-sub warfare.
I've even seen some G3M with such a material.
There aren't big differences between the G4M2-A and -E models.
http://www.warbirdphotographs.com/NavyJB&W2/G4M-16.jpg
http://www.warbirdphotographs.com/NavyJB&W2/G4M-23.jpg

The biggest 3D differences would be for a G4M3 which had a different tail-gun station completely redesigned.
http://www.warbirdphotographs.com/NavyJB&W/G4M-8s.jpg