man that reminded me of some mod I've been working on 3 years ago exactly the same textures, sky, lightsetup http://www.hlportal.de/?sec=mods&site=m ... mod_id=125
Very nice I did end up changing that sky to a similar one because for some reason when I used that my reflections got really messed up. They essentially didnt reflect. To this day I still have no idea why that happend. I'm assuming you're using the HL2 default sky btw.
I'm not 100% sure either :/. A friend made that sky from some of the available shots at cgtextures.com. I'll start by darkening the env_light to se