Corrective filters enable you to eliminate image flaws and apply special effects. Destructive filters, on the other hand, are devoted solely to special effects. Even though Photoshop offers nearly twice as many destructive filters as corrective counterparts, destructive filters are less frequently used and ultimately less useful.
Don't get me wrong — these filters are a superb bunch. But because of their more limited appeal, I don't explain each and every one of them. Rather, I concentrate on the ones that I think you'll use most often, breeze over a handful of others, and let you discover on your own the ones that I ignore.
In addition to explaining the commands found on the Filter menu, this chapter also explains the new Liquify command, which probably ought to be on the Filter menu but isn't. Liquify enables you to shove pixels around your image by dragging them, providing a means for freeform, interactive distortion.
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