The envisionment of TK is to bring you what was promised by GSC for STALKER: Shadow of Chernobyl, instead of the gutted retail release we were left with. TK aims to cover every aspect imaginable from gameplay intended to genuinely scare the player, to graphics for the absolute best visual experience, cut mutants, absolute realism, optimisations, stability, and a complete game mechanics overhaul, all without breaking the story. The idea is to present the player with a complete retail experience for the purist that liked SoC but wished it was far more fleshed out. In no way what so ever does TK try to be like old beta or alpha builds of SoC, TK aims to enhance everything SoC already has - nothing more, nothing less.
A more refined version of the new rain and thunder sounds, first video was the alpha, this is the beta. As I'm sure some who are unfamiliar with certain things will think it or say it in a roundabout way I'll clear it up now; Sound and light do not travel at the same speed which is why in real thunderstorms you will sometimes see thunder but not hear a "crack" until several seconds later, this has been pretty accurately copied in TK now.
I've also tweaked the thunder sounds themselves for some sort of compromised balance between a natural thunderstorm and something derived from the result of severe nuclear fallout, causing a messed up ionosphere etc.
You may need to turn your volume up but you will hear a good balance of varying types of distant thunder and occasional closer thunder cracks. Combined with the ambient sounds plus what I was aiming to do, which is to say, NOT have something that totally disregarded the fact the zone is essentially a nuclear fallout area and thus a "scorched earth", the balance should satisfy most.
Theres real science in what I've done here, I've not just done something thats "pretty".