Triangle Clip Path Experiment w/ SVG
HTML
<svg width='0' height='0'>
<defs>
<clipPath id="cp" clipPathUnits="objectBoundingBox">
<path d="M0.500, 0.945 L0.994, 0.090 L0.006, 0.090 L0.500, 0.945 L0.500, 0.650 L0.262, 0.238 L0.738, 0.237 L0.500, 0.650z"></path>
</clipPath>
</defs>
</svg>
<div class="triangle first"></div>
CSS
html, body {
height: 100%;
width: 100%;
background: linear-gradient(to bottom,
rgba(103,178,111,1) 0%,
rgba(76,162,205,1) 100%);
}
.triangle {
-webkit-clip-path: url(#cp);
clip-path: url(#cp);
width: 300px;
height: 300px;
background-size: cover;
background-blend-mode: screen;
position: absolute;
top: 50%;
left: 50%;
}
.first {
background-color: #333;
background-image: url("http://i.giphy.com/xbkfWmU8bcTMQ.gif");
-webkit-transform: translateX(-65%) translateY(-50%) rotate(60deg);
transform: translateX(-65%) translateY(-50%) rotate(60deg);
}
