To help add that copper shine seen in newly installed copper roofing, we will add a specular map to increase the specular reflection but varying it to simulate what happens to copper when exposed to air for only a few days.
If you completed the previous recipe, load the
copper-turret-04.blend saved earlier. Alternatively, you can download a pre-created blendfile from the Packtpub website.
We will now add a specular map to our copper material simulation. So, Open the
copper-turret-04.blend, and select the turret object.