With the Full Width option you are able to control several variables including: background image, background color, text color, full width content + control of container padding in pixels, or use of standard padding size. With the background image you can control it for fixed or scrolling (you can also control placement of repeating patterns).

How to access: Click [R] for the Shortcode Editor > Select Full Width Parallax > Select Options to Customize.

See Full Width in Action