on">
        <div class="lesson-main">
          <p>This article is part of a series of articles about three.js. The
first article is <a href="fundamentals.html">three.js fundamentals</a>. If
you haven't read that yet and you're new to three.js you might want to
consider starting there. The
<a href="cameras.html">previous article was about cameras</a> which is
important to have read before you read this article as well as
the <a href="lights.html">article before that one about lights</a>.</p>
<p>Shadows on 