_[T]hanks to decades of research into ungulate vision combined with the latest in military concealment technology, hunters can don a computer-generated camouflage with fractal designs that look nothing like a shrub or a tree, at least not to the human eye. Named Optifade, it’s being introduced this fall by W.L. Gore (the makers of the breathable Gore-Tex rain gear) and promoted as the first camouflage scientifically designed to make hunters invisible to deer. . . .