This tool works with any two SDS objects, but it is designed for use with two SDS meshes that share the same shape. To start, duplicate the desired SDS mesh to create two surfaces with identical topology and geometry, or select two existing surfaces that represent the outer and inner boundaries.

Then select two SDS objects and activate the tool. These two selected objects represent:

Then specify desired wall thickness either by using the Thickness control shown in the Control Bar, or interactively by clicking two points in the View window.

The relationship between the two meshes determines the outer and inner surfaces of the resulting hollow structure. This is controlled via the surface normals of the second mesh, using one of three deformation modes:

	Note
	Many 3D printers rely on surface normals to determine the inside and outside of an object. To produce a hollow object, the outer mesh should have normals pointing outward, while the inner mesh should have normals pointing inward. You can use the the section called “Flip Faces” tool to flip the surface normal directions.