In article <19970103202000.PAA23909@ladder01.news.aol.com>, glmeador@aol.com says...

>An old trick was to leave the lense wide open, and put a piece of carboard
>(or thin metal, plastic, etc.) in front of the lens to serve as the
>aperature. The cardboard has one or more shapes cut out of it. In this
>manner, the out-of-focus light sources take on the shapes of the cutouts.
>I know that it is a little hokey, but some folks seem to like the effects.

An interesting variation on this occurs when photographing toward sun
reflections off rippled water through folliage, flowers, etc. close
to the lens used nearly wide-open - out of focus parts of the nearby
subject material can appear repeatedly in the large image spots of
the out-of-focus sun reflections.
Hope This Helps