Given that Sony has fully shifted focus to PS4 and PS5, official dynamic theme support is dead. However, the homebrew community is stronger than ever. In late 2021, new tools emerged to convert PS4 custom themes to PS3 dynamic formats.
Unlike static themes, which simply change the background image and icons, bring the XMB to life. They feature moving background animations, sound effects that trigger when you scroll, and sometimes even interactive elements that respond to your controller inputs. ps3 dynamic themes download 2021