Is there a way to activate mirroring with radial symmetry? I know it works pretty well in Blender but have yet to get the radial + mirroring combo with ZBrush.
As far as I know, no. But you can delete one half of the mesh, sculpt the model, and mirror it via SubTool Master + Geometry => Modify Topology => Weld Points. You also have to do this operation in orthographic camera mode, and with a depth mask for your brush as you don’t want to break the symmetry line in the middle(or just mask that portion).