To Remove a Material from the Model
1. Click File > Prepare > Model Properties. The Model Properties dialog box opens.
2. Click change against Material. The Materials dialog box opens.
3. In the Materials in Model list, select the material to delete.
4. Click
or click
Edit >
Delete in the
Materials dialog box.
5. Click OK when you see a confirmation message. The material is removed from the Materials in Model list and from the model database.