ZBrushCentral

Project only old topology when importing

How can I project only “old” topology when I import a mesh?

I started out with an initial mesh in zbrush with multiple sub division layers. I then decided to add an inner mouth and so I exported the lowest sub division into blender and modeled in the mouth. Finally, I exported this new mesh back into zbrush.

This new mesh is simply the old mesh plus some new vertices for the inner mouth. However, when I project all levels of subdivision, zbrush attempts to project some of the inner mouth onto the surrounding face.

What’d I like to achieve is to simply project the details for everything but the newly added vertices that represent the mouth. Is this possible?

One approach that I tried was to try to mask off/hide the inner mouth. I wasn’t able to figure this out yet since the rest of the face kept getting in the way. I tried masking with backface enabled - but this still selected parts of the face.

My last alternative is to try to model the inner mouth directly in zbrush if possible…

Hi @waylonion

To easier select the mouth bag, try going to “Tool > Display Properties” and click “Flip” to show the inside of the head. Then select and hide the polygons then reverse the selection then “GroupVisible” to assign it’s own polygroup and then you can hide that polygroup then project the details. Hope that helps. In case you don’t know, to select polyloops, hold Shift+Ctrl and select Lasso stroke and click on appropriate edge in the loop. You will know which edge to click on after the first one.

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Thank you for the guide! I think it worked out exactly as I needed it to.

The tricky part was going through the steps to hide/sub-divide/project

  1. subdivide
  2. hide inner mouth
  3. project all details
  4. un-hide inner mouth