When Skynyrd recorded “Double Trouble” 30 years ago they may not have had Johannes Wunner and Sallie McIlheran in mind, but all you visual artists had better watch out when this husband and wife photo-and-paint team comes around to your gallery. You want color? You want ironic compositions snared by a quick shutter finger? Wunner brings it, working his Leica and his Hasselblad with a boldness you know comes straight out of Freising, Germany. McIlheran, a Fort Worth native who studied painting in Vienna, watercolors with boldness too, often with bright details set against Rothko-like color fields.