Arms > Torso material issue

Kvadning

Any ideas what's going on in the attached image?

 

I've noticed a line between the arms and torso surfaces has suddenly appearing for some characters.

 

This is Miriam by Bluejaunte but I also see it on Leisa 8 for example.  Other characters however are unaffected.

 

I've looked at the surface settings but (with my limited knowledge) don't see anything obviously different between them.

Richard Haseltine

Is this just in preview or in renders too?

Kvadning

Richard Haseltine said:

Is this just in preview or in renders too?

In renders too.