Finished out the re-topology with a mix of Zbrush zRemesher and quad draw in Maya. I had some issues on the shell area, as the sharp areas don't play too nice in Maya. I then moved to Substance Painter to bake and create textures, which turned out much better than expected. I tried to use all the new bells and whistles the new Substance Painter has since I've last used it (subsurface scattering, displacement, etc). In all this project is coming along nice and look forward to posting more. All images rendered in Substance Painter and the below image is a test in Unreal Engine 4.24.
Unreal Engine Render Test
