“If the signage in a movie has top billing over Frances McDormand … you can bet a whole lot of thought went into its conception and execution. … And everything about the [eponymous signboards] – from the design and classic construction, to the custom structures that display them – is authentic. For the complete billboard blow-by-blow, we spoke with Three Billboards‘ production designer Inbal Weinberg, the brains behind Mildred’s advertising war.”