Brine Banner force full width

I'm using a brine template. I want to have banner images on each page, but I would like the images to always display full width. Another way to say this is that I would not like the images to become cropped horizontally if the window is scaled. 

ideally I'd like to retain parallax, but this is not necessary. 

I have toyed with making the pages indexes, and putting a 1-image gallery at the top of each one, but the images are not all the same height so I run into other scaling issues when I try to do this. 

If I were to go the gallery route, I would like to find a way to control the gallery spacing and aspect ratio parameters per page. Currently these controls are site wide. 

Please post a link to your page.