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# Overriding Look Files

When a look file is added to the Look Files list, its materials are added to the scene graph under the location /root/materials/lookfile. You can then override/edit these materials.

To override or edit a Material within a look file:

| 1. | Add the look file to the Look Files list.

| 2. | In the Parameters tab, select Add Override > Material.

You can narrow the list of nodes in the Add Override menu using the Filter field.

To have the new Material node override affect all passes, toggle the New Overrides Active For All Passes to on.

| 3. | Follow the steps for overriding and editing a material at Editing a Material.

Note: It is also possible to Shift+middle-click and drag a node into the overrides list from within the Node Graph tab.

You can toggle the ignore state of an override by right-clicking on the override in the Add Override list (or selecting it and clicking ) and selecting Toggle Ignore State.

### Duplicating an Existing Override

To duplicate an override, in the Add Override list, right-click on the override (or select it and click ), and select Duplicate Override.

### Viewing the Parameters for an Override in a Separate Panel

To view override parameters in another panel, right-click on the override in the Add Override list (or select it and click ), and select Tearoff Parameters of Override... .

### Deleting an Override

To delete an override, right-click on the override in the Add Override list (or select it and click ), and select Delete Override (or with it selected, press Delete).

Note: You can change which passes the overrides are valid for using the active for passes menu to the right of Add Override.

Tip: Although the most common use of the Add Override menu is for adding material overrides, any kind of override may be created so long as the node has both an input and an output.