An empty domain can be generated by choosing Create Empty Structure and clicking the Edit… button.

In the Voxel Geometry Parameters dialog, enter the parameters defining size, resolution, origin, and periodicity of the empty geometry. Also, instead of an empty domain, a material from the Material Database can be assigned to material ID 00. In this way, a block of any given material can be generated. Clicking OK closes the dialog and clicking on Create Empty starts the creation.

An empty geometry with the give size is created.