Material Link
Add a Material Link node () under a Materials node in a model component to add a link to a material that you have added under the global Materials node () and use it as a material in that component’s geometry. To add it, right-click the Materials node and choose Material Link from the More Materials submenu. The Material Link node’s Settings window is similar to the Settings window for a material node (see The Settings Window for Material), with the exception that there is no Material Properties sections. Instead, it includes the following section:
Link Settings
From the Material list, select the global material that you want to link to:
Any Switch node, if you want to run a material sweep.
None, to not link to any global material.
Click the Go to Material button () to move to the selected material node. Click the Add Material from Library button () to add a global material from the material libraries or a new blank global material. The added material then becomes the one selected in the Material list.