I'll say it differently way next time.I also offered constructive criticism. I hope Fierylion takes a page from Virtual Ganiner 2's approach to the belly. Perhaps fierylion has his own ideas
Its more that the polygons are too apparent like youre zooming into something so you see imperfections clearer. Itll depend on how the models are handled. Not sure if unreal deals with blenders shape keys but it shouldnt be that bad to modify and replace all the models if you just give the belly more polygons.
I would offer help modifying or remaking these models though.