I was trying to apply the code in here https://siteorigin.com/thread/feature-request-site-origin-hero-full-screen-image-as-viewport/ to a page where I’m using Hero Image widget and I needed that full screen functionality.
Here it is: http://volans.planurbis.eu/
I have found two issues that maybe they have an easy fix. First of all is that you have to resize the window in order for the image to fit the whole viewport. The other is that it adds the height of the navigation bar so the image is larger than the viewport.
Any suggestions to get this to work?