Optifine, in addition to making most peoples' Minecraft run faster, also adds a whole slew of ingame visual settings!
http://www.minecraftforum.net/topic/249637-Optifine

I HIGHLY RECCOMMEND OPTIFINE!
NOT ONLY DOES IT MAKE MINECRAFT RUN MUCH SMOOTHER, BUT ITS MIPMAPPING SUPPORT IS NEEDED FOR ANY LARGE TEXTUREPACK!

If you do not use MCPatcher or Optifine you will not get all the content from this pack. 

