Oh well, I managed to bake all 5 materials in 3DCoat. Came out pretty well. InstaLOD does a great job decimating stuff, but baking requires a little tweaking I guess.
Hi 4u2ges, Thanks for your feedback. Please provide the content or project which can make this result, and that us know about your export setting. Then we will test further. Melvin Reallusion.