Due to his studies and his study trips to different countries and climate zones Rossborg finds another theme: large-sized cloud sceneries, landscapes and portraits. Those are on the one side to be called representational, but could at the same time develop even to totally free, abstract formations. Cloud sceneries of the former pilot offer again and again a new sight and different atmospheres: from lifelike reproduction of clouds to color-coordinated completely free interpretations, from a peaceful atmosphere to a threatening appearing atmosphere. The viewer can follow his feelings and dreams. Landscapes as well as portraits are often alienated but still harmonic in its special originality. Wolf Rossborg uses oil colour for his realistic painting, which he applies in a special procedure, the Schwabeltechnique. Through this, he achieves smooth transition between colour layers and for this reason achieves a photographic effect with his paintings.