This part of the tutorial doesn't exist!
I had planned to cover textures, loading and displaying 3D models from files,
and basic OpenGL lighting.
But I became busy with other projects and never
really had the time to finish it.
If you (or perhaps someone you know) feel
like finishing this tutorial, please contact me. I'm sure there are a lot
of people who would benifit.
Otherwise there are more Basic4GL OpenGL tutorials on the wiki site, such as Davy's OpenGL tutorials or NiceGuy664's 3d Tuts.