If you have created a gable roof, you can change the appearance of the raked surfaces beneath the pitched ends of the roof by editing the material selection for the roof’s Gable End component.
To change the appearance of raked surfaces under gable ends:
Click on a roof edge to select the roof.
Right-click and select Properties, or select Edit > Modify Elements > Properties.
In the Roofs dialog, select the Appearance tab.
In the Components list, select Gable End.
In the Material area, click the Select button.
In the Materials dialog, select the material you would like to use, then click OK.
Click OK in the Roofs dialog.