http://forum.unity3d.com/threads/34570-ShaderFusion-node-based-shader-editor-(Closed-Beta)

http://forum.unity3d.com/threads/56180-Strumpy-Shader-Editor-4.0a-Massive-Improvements/page97

http://udkc.info/index.php?title=Tutorials:World_Position_Offset

http://www.terathon.com/forums/viewtopic.php?f=9&t=6225&st=0&sk=t&sd=a

http://polyphobia.de/public/tutorials/TF2shading/shader.jpg

http://technical-eden.blogspot.com/2012/01/gradient-mapping-awesome-way-to-get.html

http://www.polycount.com/forum/showthread.php?t=75651

http://forum.unity3d.com/threads/56593-ShaderFusion-(node-based-shader-editor)-released!./page7

http://xna-uk.net/blogs/randomchaos/archive/2009/04/22/basic-hlsl-lighting-techniques-episode-8-planet-shader.aspx