Texturing the Windows

When texturing the windows, I wanted a similar aluminium texture for the window frames as seen in the first image. To achieve this, set all the polygons that make the frame to ID 2 and the polygons that make the glass to ID 1 and apply the glass texture to ID1 in a multi sub object map and the material which will the the aluminium in ID 2. To make the Aluminium, turn the diffuse down to 0 and turn up both the reflection and reflection glossiness to 1 and the Fresnel IOR to 15. Then apply a Aluminium roughness map to the reflection glossiness and to the bump (which had a value of 1.)