This "mod" was one of the first test builds that I did with the Source Engine back in 2008, and died that same year.
Lots of detail goes into a source map.
Shown here is;
Lights
Decals
Physics Props
Static Props
Dynamic Props
Spotlights
And other things you cannot see like;
"NODRAW" Optimization.
(Map built completely with "tools/nodraw" texture first, then painted surface by surface for 5 times better frame rate)