Any thoughts on how one would go about creating a sediment plume (i.e. the cloud of lighter and/or unsettled sediment washing from the end of a river into a larger body of water)? I'm using Wilbur and FT but have access and rudimentary knowledge of various other tools such as Illustrator and GIMP.

An example pic:

sediment-plume.jpg

Thanks all,

-- First time poster, long time lurker