Fixed it. The problem was that Specular values in modo were set to high. So I guess the high shine I added to the pool balls where to high on the specular levels, so obviously the import worked fine, but values were a little off. Adjusting it manually worked of course. This is why I was able to fix it by manually add textures. At least now I know that it was just the specular map at this time. My obvious lacking experience with modo did not help me either.
