08-28-2018, 08:08 AM
Not a bug and it's scaling not texture filtering, if you don't want it to change just disable texture scaling. And if you really need upscaling, use an upscaling post proces shader like 5xBR or a custom branch with realtime texture scaling(much more demanding).
http://forums.ppsspp.org/showthread.php?tid=6594 - Custom PPSSPP Shaders!
http://forums.ppsspp.org/showthread.php?tid=3590&pid=117172#pid117172 - simple CE scripts to help creating CWCheats,
https://github.com/LunaMoo/PPSSPP_workarounds - CWCheat workarounds.
http://forums.ppsspp.org/showthread.php?tid=3590&pid=117172#pid117172 - simple CE scripts to help creating CWCheats,
https://github.com/LunaMoo/PPSSPP_workarounds - CWCheat workarounds.