Three Transformations of the Left Top Pattern

Photo date: October 11, 2020. Photographer: Mark Mahin.   

I took the photos below while photographing only ordinary drops of pure, clean water falling in front of a black featureless background.  On this day I got a pattern in the left top of orbs, a pattern that underwent three transformations.  The pattern first appeared as a circular shape, as shown below:

The pattern then transformed into a pear-like pattern as we see below:

The pattern then transformed into a kind of gourd-like pattern as we see below:

The pattern then transformed into the two-part pattern shown below: