[sldev] Tutorial for SL shaders ("for dummies")?

[Mike Monkowski]

Tigro Spottystripes wrote:
> Is there somewhere some tutorial, with examples and all, for editing and
> adding to the client's shaders made with people that have never done
> this type of thing before in mind?

Starting from where?  Do you know OpenGL shader language, but not the SL 
use of it?  Or are you writing your first computer program?

Mike