Importing Topology

From ZBrush Info

You can also bring topology in as an OBJ. The steps for this are below:

1. Select the Simple Brush in the Tool palette to avoid ZBrush importing one model into another. Press Ok to drop your model to canvas
2. Press Layer:Clear to clear the document
3. Press Tool:Import and select OBJ
4. Select the old model you want to retopologize
5. Press Tool:SubTool:Append and select the newly imported model that represents new topology
6. Make sure they line up correctly
7. Select a ZSphere and draw it on the canvas
8. Press Tool:Rigging:Select and select the design sculpt from the pop up window. This is the tool with the geometry you want to change.
9. In the Tool Palette select the model that has the design sculpt and new topology sculpt as SubTools of each other
10. Make the new topology sculpt the active SubTools by selecting it in the SubTool area.
11. Select the ZSphere you used earlier
12. Press Topology:Select and select the previous tool. Since the new topology is the active SubTool it will bring that in instead. Note, right now there is a 25,000 poly limit on the base mesh.
13. Press Edit Topology
14. If you want to push or pull points you can clear the mask that is automatically created by pressing Tool:Masking:Clear.
15. Press Tool:Rigging:Projection
16. Press Tool:Adaptive Skin: Preview
17. Adjust Tool:Adaptive Skin:Rez to a higher leve to get more polygons on your new mesh.