In the Domain-Boundary Options panel, the handling of boundary grains is defined.

When Remove Grain Fragments at Domain Boundary is checked, all grains touching the domain boundary, after the initialization and the grain-fragment reconnection are done, are removed. This might improve the results, since boundary grains which do not lie entirely within the domain might lead to incorrect grain shape estimates. The visualizations below are loaded from the Result Viewer of the *.gdr result file (under the Grain Visualization tab).

When Remove Grain Fragments at Domain Boundary is unchecked, the Periodicity options become available. By checking the X-, Y-, or Z-Direction checkboxes, the grain space is treated as periodic in the chosen direction(s) before the grain segmentation. Otherwise, when Periodicity is not chosen in a direction, the structure is assumed to end at the domain boundary.