This effect was generated in Filter Forge, a Photoshop plugin that allows you to create your own filters.
This is a simple filter that creates the illusion of the image being in an underwater environment. There are dials to control the water tint, caustics, particulate matter, and image detail.
The image can be either darkened or lightened to help the effect.
***Darken Image slider can only be used when Darken Image option box is checked. The Lighten Image slider can only be used when Darken Image option box is unchecked.
Moving the Variation slider will change the pattern of the caustics and particles. To get the intended effect, the pixel size slider should be set to the maximum amount.
***This is an updated filter. A checkbox has been added to access the original caustic effect.
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