This pack is just an interesting alternative way to view the blocks in your world. It drastically changes the chromatics of a large number of blocks, especially naturally-occurring ones.

The sun is now a massive blue star, and the moon has a bluish hue as a result; both of them graphically look a lot nicer than the original versions as well.

The photos show some shots using a random world to get an idea of the look, but also features two very awesome worlds you may be familiar with (Oddworld's Medieval Town and Tribe Jungle Village - Tree Houses) — if you aren't, then definitely take the time to check them out!