Studing air dynamic for a painting im doing. It's suppose to picture blur from a viewpoint behind a fast moving subject.. I DONT want motion blur, i'm just looking for the blur gained by strong air disturbance. Similar effect to this one: http://airshow-reviews.com/photography/f18_blur_meiringen.jpg But this one is made from hot air.. not sure the effect is the same from cold air. Anyone who got it right? ideas to approaches? cheers, F