This is one of over 4599 effects generated by Filter Forge, a Photoshop plugin that allows you to create your own filters.
This effect:
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To open this filter, you must have Filter Forge 2.0 or higher installed on your computer. If you don't have it installed yet, click here to download Filter Forge
This filter combines a custom map script, used to generate directional lighting and shadowing, with Filter Forge's built in environment lighting and ambient occlusion to achieve maximum realism. A variety of noise sources are available to test. Use source 10 for image inputs.
hard shadow realistic directional lighting ambient occlusion