more and more ice shaders, but not tutorial!

Today i have found some more shaders, but again no tutorials. i really want to understand how to use the materials and nodes in maya.


here is the first one i found, i believe both of them were made by the same person.



the shader above is a very promising one, the reason for this is because the shaders allow light to bend really nicely, it also looks like it has cracks in it. one thing i dont like is that it reminds me a little too much of glass.




this one looks more like glass than the previous one, looks like a giant glass ball.
i wont be trying to imitate this effects.