Just a note: when I re-sized the background the Title and breadcrumbs were not centered anymore. I used this css in custom.css to lign them up again.
.bc-type-3, .bc-type-4, .bc-type-5, .bc-type-6 { padding: 85px 0 !important; color: #FFF; background-attachment: fixed; border-bottom: none !important; }
