Update of my Layers page, now under the title: "Object grouping and visibility management".
I've added som line about lamps and envirnment mapping under what is now the "Research" section.
There's something about p_vertex_' concept.

But most important is the new "project briefing", where I try to define the task that shold be solved, or at least how I think about it.

http://wrstud.urz.uni-wuppertal.de/~ka0394/en/blender_ui/layers/index.html

Any feedback is welcome!