Most good modern art disrupts the image one way or another, but the best pieces in this four-person show do it unconventionally. Mark Ottens's Obsessive Paintings of Various Sizes groups 13 abstract panels whose inventive designs are so different--sharp-edged triangles, a weave of lines, out-of-focus blobs--they form an inventory of possibilities, each of which seems to undercut the others. His Pastoral interrupts its grid of brightly colored stripes and rectangles with fetching cartoony landscape fragments, the conflict between the two styles reminding us that all pictures are pure color. David Reninger's six-canvas Fruit Abstraction displays apples and pears in labyrinths of disks with ambiguous depth effects, creating tension between representation and abstraction. And Nick Black's amusing Shark-Botts combines motorized contraptions that move along the floor--toy shark tails flapping, speakers inside playing "Mack the Knife," and feather-duster mouths moving in ridiculous attempts at lip-synching. Ukrainian Institute of Modern Art, 2320 W. Chicago, through August 29. Hours are noon to 4 Wednesday through Sunday; 773-227-5522.