title: Phong Shading vs Tessellation
body: <p>I ran across <a href="http://en.wikipedia.org/wiki/Phong_shading" rel="nofollow">Phong Shading</a> while looking at the Source Engine. The desription sounds very much like <a href="http://www.nvidia.com/object/tessellation.html" rel="nofollow">Tessellation</a>. But when I looked it up, I didn't really find anything directly comparing the two. Now in DirectX Tessellation isn't used like Phong Shading in HLSL. What's the difference? And which one should I use? </p>