If you want to tag along, open an image in PS then go to Filter>Liquify or press Shift+Ctrl+X.
Here are the Liquify Tools:
Wrap Tool - Freehand distortion
Pucker Tool - Shrinking effect
Bloat Tool - again, self-explanatory
Pixel Shift - Compresses the image to the left while
pressing downwards, to the right if otherwise
pressing downwards, to the right if otherwise
So now you know how fashion magazines make their models super skinny, just remember not to overuse it. =) And that's a wrap!
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