Click the green button to add a new pattern. Enter the pattern name (this name cannot contain spaces).
When OK is clicked the Edit Pattern dialog pops up where the pattern properties can be adjusted, and the pattern is added to the list of modifiers.
You can edit a modifier by double clicking it in the list of modifiers.
To assign a pattern to a given surface, select the surface from the Material surface properties list and click its Modifier field. A drop-down list of all available modifiers in the project will appear. Select the pattern you wish to apply to the selected surface.
The red button will delete the selected Modifier and any materials which reference this modifier will revert to the Void option.