Certain mediums of art seem annoyingly democratic. Everyone with a camera thinks he’s magically become a photographer; with Final Cut, a director; with Serato, a DJ.Â Similar thinking goes with collage. With Photoshop and Google Image Searchâ€”or for the stubbornly analog, glue and old magazinesâ€”one has all the needed tools to rip new meanings out of old contexts. How does one break any new ground as a combiner of things, while also presenting a distinct voice and vision? The designer Mark Weaver relies on rules. Confining his canvases to a few well-chosen elementsâ€”confident typefaces, unpeopled landscapes, period portraits, severe architecture, geometric shapes, arcane chartsâ€”he builds a sense of mood and mystery that floats quietly toward the surreal.