Every PSP game has a unique ID. For the fan-converted Storm 3 , the ID varies depending on who built the ISO, but it is commonly:

Set to Off or 1 if your device experiences minor slowdowns.

The base PSP Naruto games feature low-resolution textures designed for a 480x272 screen. When scaled up on modern smartphones or PC monitors, these visuals look blurry and pixelated.

Verify that the folder name inside PSP/TEXTURES/ perfectly matches your game's region ID.