 Tracking System</a></div></td>
</tr>
<tr>
  <td class="ContentsHeading"><div class="divh1"><a name="u1_8"></a><a title="1.8" href="u1_8.html#u1_8">Speed Considerations</a></div></td>
</tr>
<tr>
  <td><div class="divh2"><a name="u1_8_1"></a><a title="1.8.1" href="u1_8.html#u1_8_1">Render Priority</a></div></td>
</tr>
<tr>
  <td><div class="divh2"><a name="u1_8_2"></a><a title="1.8.2" href="u1_8.html#u1_8_2">Render Window</a></div></td>
</tr>
<tr>
  <td><div class="divh2"><a name="u1_8_3"></a><a title="1.8.3