To open the Gaussian Random Field Generator, right-click on Volume Field in the Project Status section in the left-hand side of GeoDict and select Create Gaussian Random Field.

At the top left of the Gaussian Random Field Generator dialog, the name for the file containing the generation results can be entered in the Result File Name (*.gdr) box. The default name can be kept, or a new name can be chosen, fitting the current project.

The available units (m, mm, µm, and nm) are selectable from the pull-down menu at the top right of the Gaussian Random Field Generator dialog. When the units are changed, the entered values are adjusted automatically.

The result files are saved in the chosen project folder (File → Choose Project Folder, in the Menu bar). If a GeoDict result file (*.gdr) with the given name already exists in the project folder, a warning message is shown at the start of the creation process. You can either decide to back up the old file, to overwrite it, or to cancel and choose a new file name.

After setting all autocorrelation functions as desired for all three directions, clicking Run generates the Gaussian random field.

If the domain parameters are not large enough to represent the given covariances, a warning dialog appears. Decide if the generation should proceed or if it should be aborted. Changing the domain size accordingly improves the accuracy.