Create Lattice and Surface Regions

Set lattice properties, then create skin and hollow surface regions.

1. In Optimization Utility, in the Properties Panel, Parts tab, expand Lattice > Unit Size and set X, Y, and Z values all to 10 mm.
   
2. Expand Thickness and set values as shown to Type Variable, Threshold 0.6 mm, Min 0.6 mm, and Max 3 mm.
3. Set Lattice Topology to X, and Surface Trim to Intermediate.
4. In the Toolbar above the display window, click Create Component .
5. In the Properties Panel, select the Parts tab and then click Lattice to see the lattice inside the part bounds.
   

   Visually examine lattice symmetry within the part to see whether it appears to provide balanced support for the skin elements. If necessary, you can adjust Unit Size to change the cell dimensions or apply Offset values to shift the lattice position. If you make any such changes, click Create Component again to regenerate the lattice.

6. Collapse the Lattice tree, and expand Surface Regions.

   Note that Region1 exists by default.

7. Right-click Surface Regions > New Region.

   Region2 is created.

8. Expand Region1 and set Type to Skin. Under Thickness, set Type to Variable, with Threshold and Min values of 1 mm, Max value of 3 mm.
   
9. Set Region2 Type to Hollow. This Hollow region will apply to the Lattice.