This mod makes it so that you can see for as far as you want no matter how far under the ground you are, which is very helpful combined with an x-ray so you can see rare ores, such as diamonds, from far away and go directly to it.
-This does not require ANY mods
How To Install
1. Go into %appdata%/.minecraft/bin/minecraft.jar/
-This does not require ANY mods
Before:
After:
Download: http://adf.ly/UV3Qi