From 1.6 to 1.7 the resource pack system was altered a bit and the new textures you need to add are:
- acacia logs and planks
- dark oak logs and planks
- stained glass
- podzol
- all sorts of flowers
- new fish
- packed ice
To make a texture pack with the new resource system you need to:
In your .minecraft folder there is a folder called "versions" and in it are the folders containing the .jars for the versions you've played on. Open the 1.7.2 one then the 1.7.2.jar file in there. The very top folder is called "assets" and that is where all the texture files are. You're going to want to extract that folder from the .jar and copy the folder and all that is inside it to whatever folder you're going to make your texture pack in. Open the assets folder, and the minecraft folder in it. You will see 5 other folders. The font, lang, and shaders folders are not necessary unless you want to change the names of items and including them is not the best idea, and makes the final texture pack a large file that takes a while to download. Feel free to go wild with all the stuff in the "textures" folder when making your pack, though! Once you're satisfied with the textures, navigate back to the folder you put the "assets" folder in, and add a text file. Put this in it:
{
"pack": {
"pack_format": 1,
"description": "What you put here will show in-game in the texture selection menue"
}
}
and save it as pack.mcmeta then make a 128x128 (or whatever resolution you want) pack.png file which will show up in the texture selection menu in game. Compress the assets folder, the pack.png, and the pack.mcmeta into a zip folder and TA-DAH!!! 1.7.2 texture pack away!