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I have been taken some pictures of clouds. I am now trying to add digitally that visually pleasing lighting effect called "god rays", where the sun shines around the edges of the cloud and the path of the light can be seen all the way to the ground.
Any way, how to actually generate the rays isn’t the question. The problem that I’m having, is that I have in mind the function of a relatively simple filter, except I cant find a filter that works. I am searching for a filter which reevaluates the footage on the basis of its contrast. In otherwords, after applying the filter, the brightest parts of the image will be those which differ most from their surroundings. Photoshop’s "High Pass" filter is close, except it seems to split the image into light AND dark areas, and the high contrast areas cast "shadows". High Pass, I think, is doing something more complicated than what I am looking for. Does anyone know how to accomplish this? Any help would be much appreciated. BTW- this is actually a video question (already posted on the AE forum) so an automated procedure is necessary (i.e. painting the rays by hand or by radial-bluring a mask painted by hand is not an option)
Any way, how to actually generate the rays isn’t the question. The problem that I’m having, is that I have in mind the function of a relatively simple filter, except I cant find a filter that works. I am searching for a filter which reevaluates the footage on the basis of its contrast. In otherwords, after applying the filter, the brightest parts of the image will be those which differ most from their surroundings. Photoshop’s "High Pass" filter is close, except it seems to split the image into light AND dark areas, and the high contrast areas cast "shadows". High Pass, I think, is doing something more complicated than what I am looking for. Does anyone know how to accomplish this? Any help would be much appreciated. BTW- this is actually a video question (already posted on the AE forum) so an automated procedure is necessary (i.e. painting the rays by hand or by radial-bluring a mask painted by hand is not an option)
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