A new texture pack called “STMLP Realism HD” and it is a 64x-TP.
The Texturepack is a remix of all HerrSommer 1.5 V2 ? TPs, LB Photo Realism TP and KoP 1.5 V2 TP.
Check out his channel: http://www.youtube.com/user/stmLP
How to Install STMLP Realism HD Texture Pack for Minecraft
In order to use HD texture packs properly (32× and higher) you will need to either patch your Minecraft using MCPatcher or using OptiFine. Optifine is preferred as it includes all of the features of MCPatcher, and greatly increases game speeds and graphics settings. MCPatcher tends to be updated on the same day as Minecraft updates, so use it instead if you are in a hurry.
Credits: Milanovic Stefan