Read the first comment:
different configurations of Garry's Mod post-processing effects applied

How do you do that ;-;

WOW!!!!

Beautiful...brilliant work!

Thanks, guys! I'm so happy I'm not the only one loving such stuff.
2 Clan Wolf: yea, this would be great. Actually, you can even change the Sun position in Garry's Mod. But this would take too much time, and I'm lazy :\

you shuld do a timelapse video, of this one view shot going through what seems like a 24 period (we know it isnt) but still would look pretty cool.......too bad those tress dont move

fraking beautiful! man u're awesome :)

You monster!

I've made 17 screenshot of one scene with different configurations of Garry's Mod post-processing effects applied. (All in-game effects, no editing!)
I've uploaded 6 of them. (I could not upload less - they all look different and awesome, don't you think?)