ZBrushCentral

How can I delete inner pats of the intersecting hemispheres ?

half side of spheres deleted.
all spheres are merged into one subtool (yet splittable);
attempted to paint mask but failed. maskpaint also paints inner unwanted surfaces too.
question is as title is.
How can I delete inner pats of the intersecting hemispheres ?
(thanks)

Attachments

P8_1.PNG

P8_2.PNG

You could dynamesh it.