clarify real time vs pre render Fixes #5

Author: Nick Desaulniers

index.html

@@ -172,6 +172,22 @@ <h2>Fragment</h2>
           <h2>Frame</h2>
           <p><i>One of the many still images which compose the complete moving picture; each image looks rather like a framed picture when examined individually.</i></p>
         </section>
+        <section>
+          <h2>Real Time Rendering</h2>
+          <img src="realtime.png"/><br/>
+          <p><i>Doing the rendering computation fast enough, so that the series of rendered images allow for interaction taking into account user input.</i></p>
+          <ul>
+            <li>30 fps = 33.3 ms</li>
+            <li>60 fps = 16.6 ms</li>
+            <li>90 fps = 11.1 ms</li>
+          </ul>
+        </section>
+        <section>
+          <h2>Pre Rendering</h2>
+          <img src="ts3.jpg"/><br/>
+          <p>Opposite of real time rendering.</p>
+          <p><a href="http://www.wired.com/2010/05/process_pixar/all/">Toy Story 3</a> took on average 7 hours to render 1 frame (24 fps), and at most 39 hours.</p>
+        </section>
         <section>
           <h2>Shading</h2>
           <img src="preshade.png"><img src="postshade.png">