are you talking about that purple light at the bottom right corner of this picture?
Observations: The anomaly in the photo to me at first made me think of a reflection like what one gets when one snaps a shot into the sun, except the "burst" of sunlight is missing. In light of that-- no pun intended--it even more resembles what you would see if you snapped a shot, for example, indoors, and light was streaming through a nearby window, and the shot was picking up the light. Of course, this photo was snapped outside with no walls or windows to create that effect!!! The anomaly appearing so window-like piqued my interest and made me think while it could be a discarded bit of cellophane, it could also be a portal to another dimension, perhaps? (This conclusion being drawn based on my personal experiences at the shrine in Conyers, GA, of which the pink tint was also of significance.)