+<p>
+<a href="#sec-1-1">In software</a>, <a href="#sec-1-2">pure Java</a> realtime 3D rendering engine. With the final
+goal of becoming a platform for buildng 3D user interfaces and
+interactive data visualization for <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">project Sixth</a>.
+</p>
+
+<p>
+Sixth 3D can be also used as standalone <a href="#sec-3">3D engine in your project</a>.
+</p>
+</div>
+
+<div id="outline-container-sec-1-1" class="outline-3">
+<h3 id="sec-1-1"><a id="ID-d03013e5-931b-40ca-bc4b-e4b3f23b9a4e" name="ID-d03013e5-931b-40ca-bc4b-e4b3f23b9a4e"></a><span class="section-number-3">1.1</span> Justification for software rendering</h3>
+<div class="outline-text-3" id="text-1-1">
+<p>
+3D rendering is done in software, 100% pure Java on CPU. At least for
+now. Modern CPU cores count keeps growing and therefore rendering by
+CPU is not as expensive as it used to be for the old single core
+systems.
+</p>
+
+<p>
+CPU rendering performance is already good enough to implement usable
+3D UI at sufficient detail level, resolution and frame rate.
+</p>