clip-path curvness
by joepenzo
HTML
<img src="http://placehold.it/300x400">
<svg width="400px" height="500px" viewBox="0 0 400 500">
<!-- https://css-tricks.com/scaling-svg-clipping-paths-css-use/ -->
<defs>
<clipPath id="myClip2" clipPathUnits="objectBoundingBox"transform="scale(0.0025 0.002)">
<path d="M400,488c0,6.627-5.373,12-12,12L12,480c-6.627,0-12-5.373-12-12V12C0,5.373,5.373,0,12,0h376c6.627,0,12,5.373,12,12V488z"/>
</clipPath>
</defs>
</svg>
CSS
img {
max-width: 100%;
height: auto;
-webkit-clip-path: url(#myClip2);
clip-path: url(#myClip2);
}