<img src="https://duomly.nyc3.digitaloceanspaces.com/articles/coding/alps-lake.jpg" />
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img {
  width: 1000px;
 -webkit-mask-image: radial-gradient(circle at 50%, black 50%, rgba(0, 0, 0, 0.2) 10%);
  mask-image: radial-gradient(circle at 50%, black 50%, rgba(0, 0, 0, 0.2) 10%);
}

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