Original Parallax Backgrounds for iOS7
There is no appropriate manner in which to get these files AFAIK. But this is how it's done anyway.


You need a copy of the beta IPSW


MUST BE FIRMWARE FOR FIRMWARE WITH BOOTROM EXPLOIT


ARM11; iPhone 2G, iPod touch 1g, iPhone 3G
ARMv6; iPod touch 2g
ARMv7; iPhone 3GS, iPod touch 3g
A4; iPad 1g, iPhone 4, iPod touch 4g, Apple TV 2G


Now follow these steps:


Convert it from filename.IPSW to filename.ZIP by renaming it. In OS X you can just highlight the file, press [Enter] and rename the file extension on Windows, you can just rename it from CMD Prompt

C:\>ren iPhone3,1_7.0_11A4372q_Restore.IPSW iPhone3,1_7.0_11A4372q_Restore.zip
Open the ZIP (WinRAR, WinZIP, Extract, whatever) and extract the DMG file that is really big, around 1GB or more
Move it to somewhere easy to refer to. For this example, I am going to use the root of the drive. You will then need to grab DMG. This can be downloaded here for MacOS or here for Windows. Move this to the same location as the unpacked DMG.
Go to TheiPhoneWiki and find the beta firmware you unpacked, and click on the Build Number. This will bring you to a page showing at the top the Root FileSystem Key. Copy the RootFS Key for the corresponding IPSW. I will use BETA 1 as the example.


Use the following syntax to decrypt the DMG:

./dmg extract [main-fs-dmg] rootfs.dmg -k [key]
This will decrypt the DMG for you. Once you have this, navigate to:
/InnsbruckVailPrime11A4372q.N90DeveloperOS/Library/Wallpapers/iPhone


You will now be able to access all the wallpapers in the BETA versions of iOS7.

NOTE: To make your life easier, I have also included a ZIP link with the iOS7 wallpapers in both the long and short sizes already. Enjoy!

Download iOS7 Beta Wallpapers