Merge Subtools
1 Check if your Subtools have similar subdivision level 2 Select your Subtool and choose Merge Down 3 Save your document 4 Select your merged Subtools and click GoZ 5 Select Editable Poly 6 Select Vertex and choose cut button After you finish select polygons and delete them to create a hole 7 Click GoZ After you import your mesh accept all changes by clicking Yes button. 8 Save your document 9 Choose Preferences-GoZ-Clear cage files 10 Go back to 3ds max 11 Select Edge 12 Select two or more edges and choose Bridge 13 After you will finish edition in 3ds max go back to Zbrush 14 Retouch the edge