Sunset clouds streaking over time over the badlands of the Red Deer River valley at Horsethief Canyon, north of Drumheller, Alberta. Admittedly a rather surreal effect but submitted for fun  A stack of 300 images stacked as with a star trail image but in this case with short exposures taken at sunset as the clouds lit uo and were moving out of the west toward the camera. So the stacking created the streaking or trailing effect. I smoothed some of the stairstep effect introduced by the interval between exposures by applying a mild radial blur filter centred on the sunset point to further blur the cloud motion. The ground, however, comes from one exposure in the middle of the sequence. Stacking with the Advanced Stacker Plus actions from StarCircleAcademy, using the UltraStreaks effect. Taken with the Nikon D750 and 24mm Sigma lens at f/5.6 and the camera ion Auto Exposure, for a time-lapse of 600 frames. Only half were used here, the ones in mid-sequence with the brightest sunset colours. Taken August 20, 2016. (Photo by: Alan Dyer /VW PICS/UIG)