So here we go for some explanations, i'm sure others can fill in the parts i missed or are wrong about
Unlag:
In short, unlag makes you hit where you aim at. Regardless of ping, you hit IF you aim on, or slightly infront of the enemy. Like if you where playing on a LAN.
So if you were spot on the enemy when you pull the trigger, the unlag calculates back in time to see if you should had hit. And if you did, you'll get the hit.
That's why some ppl think they get shot around a corner when they flee the scene and think they are safe. Because the higher pinged guy DID see you and shot and hit where HE saw you. The unlag here gives the correct hit despite the ping.
With no unlag, you'd probably missed the shot.
Timenudge:
Timenudge virtually lower the ping giving *harder* bullets because with lower ping you hit better. But as Arachnyd explained in the other tread, it also gives less accurate bullets and a warpier look on the enemies. From round -20 and up.
Example. this 150pinger have 0 nudge he unloads a clip into a lower ping guy with some nudge. He hear the hitsound (if it's on) telling him he hits 10-15 bullets before and if he gets the frag. But rtcw needs max of 8 bullets to make a frag!
Then he put, lets say -20 nudge on, goes to same position as he was earlier. Shoots the same guy and hey, this time it took less bullets to get the frag. It also means he can shoot straight on the enemy model, instead of leading the shots to compensate for higher ping.
But wait, wasn't that the idea of the unlag, to be able to shoot straight on instead of leading the shots or put nudge on?
Yes Warleagues allows timenudge -10 in matches, but that is on OSP servers with no unlag! And using -10 is more of a personal taste of how you aim. Straight on, or some leading of the shots.
Thegamecat put it well -
"Thing is timenudge is one of those things that you don't need if no-one else is using it."
r_depthbits:
This one i never knew about, untill i saw all this ppl geting kicked for it. So i searched around, and oh my what do i found out about it.
Arachnyd says its only for colors. No it's not. This one is very exploitable.
I'm not sure if it the picture can be seen orderly so here's the direct link.
http://www.tardivo.de/sniperbugge8.gif
Then klick on the picture to make it bigger so you can read it too.
It cleary shows how this setting can be used as a wallhack. And the reason why they tried this is here:
http://74.125.77.132/search?q=cache:Gb3NlVbinx0J:www.pbbans.com/forums/print.html%26client%3Dwordr%26f%3D334%26t%3D28199+rtcw+r_depthbits+wallhack&cd=1&hl=sv&ct=clnk&gl=se&client=firefox-a
It's from PBbans.