Yes, earosol spray cans. Two acrylic colours blended in with light misting of white and then blue earosol spray at the top.I also gave a whash of turquise acrylic in the middle but its almost unoticeable. In hind site I might have used more deep blue in the middle but one can always remedy this later. The spray cans worked well on the mountain area too, aplied more extensively here it gave an almost pixelated quality to it, like visual noise in a bad picture. this enforced the distance, you dont want crisp clean lines in the distant mountain you want suttle and distorted but still with lots of colours toned down in blues by the distance.