I made small scale cirrus clouds, a meter high at sea level. With a perlin ridges noise flavour in the density fractal, it makes pretty good sea foam, if you're not too fussy about where it shows up in your lake.
I'm sure this has been suggested before, but I thought I'd mention it for any newbs. :)
A mask could be made so it just appears near the shore. Great post. I had seen the post, but let it go. I was hunting other shading tech at that time.
Very good idea! Thanks for sharing!