Blender Renders Gray Full Screen so I have been following these tutorials trying to create a robot dog. I followed them to a tea and then when I go to render the animation of the dog I was told to create in this tutorial I get a fully gray screen; frame after frame.  I look for the sampling section and I cannot find it. I don't know how to fix this so that it comes up with the actually rendered animation, as well as that I had some nodes for the dogs color and other aspects and they seem to have gone as well. Can anyone help?

Link to site: https://www.youtube.com/watch?v=W4TkA5P5Qes

Dropbox Link to .blend file
https://www.dropbox.com/s/pqrrs2wcx9hsyg9/crappyDog.blend?dl=0
Your project has materials for the cycles render engine. If you render on blender internal the file will not render correctly.



Materials form different render engines are not interchangeable.