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chromium/third_party/blink/web_tests/external/wpt/css/css-transforms/preserve3d-overflow-percent.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>Overflow with preserve-3d and percentage-transformed parent is computed using the right reference box</title>
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#transform-style-property">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1626840">
<link rel="mismatch" href="/common/blank.html">
<style>
:root {
  overflow: hidden;
}
body {
  margin: 0;
  font-size: 28px;
}
#map {
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}
.floor {
  width: 100%;
  height: 100vh;
}
.skew {
	height: 20em;
	width: 20em;
	position: relative;
	left: 50%;
	top: calc(50% + 1.5em);
	transform-origin: 0% 0%;
	transform: rotateX(45deg) rotateZ(-45deg) translateX(-50%) translateY(-50%);
	transform-style: preserve-3d;
}
.cylinder {
	position: absolute;
  background-color: green;
  transform-style: preserve-3d;
  width: 7em;
  height: 7em;
  transform: translateZ(1em);
}
</style>
<div id="map">
  <div class="floor">
    <div class="skew" style="width: 13em; height: 47em; left: calc(50% + 0em); top: calc(50% + 0.5em);">
      <div class="cylinder" style="left: calc(1.5em + 0em); top: calc(38em + 0em);"></div>
    </div>
  </div>
</div>