Assuming I didn’t do anything else wrong it would seem that the method for sketching with zspheres onto a subtool is now gone in Zbrush 4. Alternative 3 in the link below:
http://www.pixologic.com/docs/index.php/ZSketching_Methods
I distinctly recall having done this in Zbrush 3.5, but now, no matter what, all zsketching on a subtool will essentially behave like an armature zsketch - completely ignoring the surface it’s suppposed to snap to.
Can anybody else zsketch onto a subtool surface?
Thomas