koobas.hobune.stream
How can I bend a 2d sprite in 4.3?
Just like this picture. And I should be able to modify it in dynamic. 
Did you ever get an answer for this question? I'm encountering the same problem.
This question is a duplicate: http://answers.unity3d.com/questions/760532/how-to-warpdistort-a-2d-sprite.html
Another option might be to use the Texture2D Get/SetPixel commands to distort the image as needed. http://docs.unity3d.com/ScriptReference/Texture2D.html
