Materials are added using the Material Browser. The Material Browser is accessed from the Physics/Add Material menu, using the Ctrl$+M$ shortcut or by right-clicking on the Materials item in the Model Editor and selecting Add Material from the popup menu. The Material browser is displayed in Figure 6.1↑. The Material Browser allows you to compose a material. Note that it doesn't allow you to set the material properties. They will be set in Model Viewer.

In the first edit field you can enter a name for the material or leave it empty to accept a default name. The name of a material can also be changed later. Below the name field, a drop down list can be used to select the material category. The tree view below the category drop down box allows you to compose the material. When you select an item in this tree view, a drop-down box will appear next to it that allows you to choose a material type for the selected material component. Sometimes, selecting an option will create more material components. You do not need to select an option for all the components. You only need to set the ones that are relevant for your model. After you selected all the relevant components, click OK to create the material and add it to the model. The material will become selected in the Model Viewer.