Vignette Swap was a new game introduced at BrickFair VA 2015. It was popular from the start, with 23 participants in its debut run. Look for the game at your event at www.BrickFair.com/Game.
That first game also introduced this awesome little cube. It's perfect for vignettes, and very affordable.
The cube's interior is 12x12 studs (strict!) and is 12 bricks + 1 plate + 1 tile tall (again, strict!). One full plate "disappears" inside the base leaving only the studs sticking up.
The cube can be purchased from AMAC Packaging for about $3.81 each (in quantities of 96 or more, including shipping), and they are also available at our Bling Desk for $5 each. Participants in the swap game receive a cube for free plus two 6x12 black plates for inside the bottom.
See examples. A vignette captures a moment in time and is usually very small.