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<h1>The mask-image Property</h1>
<h3>An image with a mask layer (an SVG image):</h3>
<svg width="600" height="400">
<mask id="svgmask1">
<polygon fill="#ffffff" points="100,10 40,198 190,78 10,78 160,198"></polygon>
</mask>
<image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="img_5terre.jpg" mask="url(#svgmask1)"></image>
</svg>
<h3>Original image:</h3>
<img src="img_5terre.jpg" alt="Cinque Terre" width="600" height="400">
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