Here, you'll be able to find which shaders do what, with visual examples to help. Look at the sidebar or down below to navigate. This wiki is a bit old - you can find a link to a newer one, which you can actually contribute to by pull-requesting this time, here! The new one has a bit of extra information, but I believe there are still a few things that are only on this one.

This section covers what core shaders there are and a few things you can do with them.

This section contains a few categorized utilities which can also serve as examples of concepts explained above.