How to Display Post Thumbnails as Banners Above Blog Posts in Brine Template family

Request

"I'd like to change how blog posts appear on a page, and give myself a different look/functionality any time I create a new one."

Problem

The Rally blog template doesn't show post thumbnails as banners like it does on regular pages, or on templates like Bedford.

Solution

Custom code without using the Developer Platform.

 

Got a special tweak request?