Hello all, I am following this tread closely, but have not seen this myself.
I always have SubD at "0" and render at SubD "1".

And I realy need a reproducable case to study.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!