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One of the key factors that can be attributed to Photoshop’s success has been the program’s support for plug-in filters. A huge industry of third-party companies has grown in response to the needs of users wanting extra features within Photoshop. Instead of covering all the hundred or more filters that are in Photoshop, I have concentrated here on just those filters that I believe are useful for photographic work, everyday production jobs and creative output. I will also show you ways you can use the Smart Filters feature to extend your filtering options.