I would like to ask anybody who know something more about this for help.
These files are from League of angels 3, they are using ATF texture compression (Adobe texture format), which was openable with ATF2PNG tool https://vamapaull.com/atf-to-png-converter-tool/
even few weeks ago. However, its not anymore.
They probably added some kind of encryption.
I was able to collect 2 samples, one before encryption and the other after encryption, i hope this would help you analyze what kind of encryption or something it could be. I also packed unpacked PNG image into the rar.
Thank you to anybody!https://mega.nz/file/mkh2wLzJ#s13WxNbLA ... nx5g9oECH0