Mesh Insert Brush
From ZBrush Info
Mesh insertion is a convenient and easy way of adding a source mesh to a target mesh. To do this, you select a mesh to be inserted using the MeshInsert Preview button, and then used the specialized MeshInsert Std or MeshInsert Dot to add the selected mesh to the current mesh.
Once you've selected a mesh to insert, you'll still need to activate one of the two specialized mesh insertion brushes to perform insertions.
In this example, we've selected a halo using MeshInsert Preview, and drawn it farther back on the head, to emphasize the fact that the slope of the skull didn't affect the inserted halo. The slider was set to a high value, so the halo appears above the head instead of intersecting it.
This example places the halo at a rakish angle, giving our saint a rather jaunty look. A high slider value results in the halo being displaced away from the head.
Each inserted mesh is assigned its own polygroup, which means you can easily split it into a subtool to refine its placement with respect to the model.
To turn off mesh insertion, simply select any of the other brushes.


