on the topic of lighting

[Styloid]

if hl2 doesn't have dynamic lighting and stuff, does that mean
we won't be able to have cool thief-like sneaking mods?

[Hoju]

One example of dynamic lighting from the movies was the stain glass rotating window. Nothing like a moving spotlight that would be in a 'thief/stealth' themed mod but I'd imagine that the engine can do it.

[Stitch]

Also in the strider video, a strider's shadow is displayed (in real time) on the front of the building. You can see it when the strider stabs that one friendly with its leg.