Add a Identity Rule node (
) to define new identity rules. If a material property in one material property group is identical to a material property in another material property group, they can be used instead of each other if there are identity rules in the material property groups.
To add an identity rule, add an Identity Rule node under the material property group by right-clicking the
Material Property Group node (
) and selecting
Identity Rule from the context menu. Here you select which of the material properties in the group that should be part of the identity rule; then add an
Identity Property subnode (see below) for each material property it is equal to. Adding an identity rule adds corresponding identity rules in all material property groups that are part of the rule. You can also add an
Identity Rule node by right-clicking the
Auxiliary Definitions node (
) to add identity rules to the
Basic material property group.