Since its inception, Minecraft has always had bad graphics. But, thanks to Optifine, a small part of this may be remedied! Using advanced texturing technology and sky color measurements, a new resource pack has been created with the capability to completely transform the Minecraft experience. Cy4n's Lighting offers unparalleled accuracy to Minecraft’s environment, including never-before-used-in-a-resource-pack (that I could find) texture names enabling separate light maps for rain and sunset.
Requires OptiFine.
Note: With these light maps, Moody nights and the End are dark. For gameplay purposes +25% brightness is recommended.
A sunrise, with and without the light maps:
A rainy day:
At night:
See, I told you it was dark.
The Nether:
The End:
Hey, the sky is black and there's no sun, so don't blame me.
Download it!