Snow

The BCC Snow filter is an auto-animated snow generator which can composite
snow over a sky color or an image layer. The filter offers extensive options
for customizing the effect and allows you to create drifts or make flakes pile
up along the edges of an alpha channel.

The built in PixelChooser, with integrated mocha planar tracking allows for
greater control over which areas of the image the filter should affect.

To learn more about this filter, and see a breakdown of the various controls,
please click here.