shaders...of...shaders...
 

Ok folks,
Here is my problem…
I’m a newbie in Maya and I want to make some shaders for my scene.
I managed to make some basic shaders, but for a rusty metallic stairs, for example, I downloaded some shaders from AliasWavefront and there in graph network I saw that they use a lot of utilities like sampler info, blend colors, etc.
The problems is that I don’t understand those utilities and if is there somebody who can explain to me what are doing those utilities or know some tutorials…
Thanks.

I´m preparing one for the How I did it forum, It should be up soon ... :D