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PS4 Guides and Tutorials       Thread starter PSXHAX       Start date Apr 25, 2022 at 10:55 PM       2,388       7      
Those interested in learning how to remove (zerofill) watermarks from retail / debug / dev / test PS4 PUP files can check out the Removing or Zerofilling Watermarks from PS4 PUPs video tutorial that PlayStation 4 Scene developer @zecoxao shared today via Twitter from his (C)ontrol e(X)ecute YouTube Channel. :geek:

Before jumping in, here are some related articles sorted by date with the oldest first:
Removing or Zerofilling Watermarks from PS4 PUPs

How to remove (zerofill) watermarks from any PUP, retail, dev, or test PS4.

  • Bls unpacking tool (or pup unpacking tool) from skfu or my repo
  • HxD or any other Hexeditor
  • Calculator
Credits to Anonymous for the findings.

Removing or Zerofilling Watermarks from PS4 PUPs Guide via Zecoxao.png



Senior Member
So it is able to unpack PS4 retail PUP(s) does this mean that it has the key (samu ?), as then only this is possible.

What does removing watermark do ?


Staff Member
One reason for removing watermarks would be if an insider wanted to leak a DevKit / TestKit file like a .PUP to scene devs, but didn't want to risk losing their job if it was traced back to their developer studio.