I am trying to use insert half cylinder mesh tool on a 3d polymesh sphere. When I do it, the underlying sphere is totally distorted and part of it missing. What am I doing wrong?
Pics or it didnt happen
here is just before control click drag and afterwards

Are you using the latest version of ZBrush?
http://docs.pixologic.com/user-guide/3d-modeling/sculpting/sculpting-brushes/insert-mesh/
I have version 4r6.
I have tried this at least 20 times, always with this same bizarre result.
I have ZB 4R6 P2. Did you miss the P2 update? Did you create a new polygroup on the sphere before, to attach the cylinder to? I had no problem doing it here last evening.
Thank you,
I did miss the P2 update.
I tried this again just now and made a new polygroup to attach the half cylinder to—it worked!!! Didn’t realize I had to make a new polygroup first. Thank you so much.
You’re welcome, enjoy the journey 