Hi, according to the help documentation of Ansys Additive, it is only a color scale for GBs vizualization. There is no meaning.
Viewing Grain Boundaries
The purpose of the grain boundaries map is to see only the boundaries of the grains, similar to grain scale images seen in optical microscopy. Internally, this two-color effect is achieved by setting a grain boundary flag to 1 and the interior to 0.
You are navigating away from the AIS Discovery experience