SmileSoldier, if you have bought Minecraft you can open it's folder in the AppData (.minecraft) and then bin, after that extract the minecraft.jar file with a program like WinRAR, after that search for terrain.png.
Smilesoldier, if you have bought Minecraft you can open it's folder in the AppData (.minecraft) and then bin, after that extract the minecraft.jar file with a program like WinRAR, after that search for terrain.png.