Nate Robins – OpenGL – Tutors

 These are ‘Tutors’, not ‘Tutorials’.  More accurately, they are little laboratories for experimenting with OpenGL parameters.  Each laboratory has a graphic pane showing an object, and a pane showing the key functions for that aspect of OpenGL.  You can change the parameter values by dragging, and see immediately what is the visual effect of a parameter value change.

I just yesterday found the fog tutor very helpful in understanding why my own fog generation was not looking as it should (and in making it right).   Take a look.