The official patch notes for version 1.0.3 confirm the following fixes:
The primary focus of this update was to fix the "clay-like" appearance of characters caused by the game's new lighting engine. assassins creed iii remastered update v1 0 3codex full
Since this update is often bundled as a "full" CODEX release, it includes the core gameplay enhancements added for the Remastered edition: Stealth Improvements The official patch notes for version 1
Assassin's Creed III Remastered is a revamped version of the original game, developed specifically for the PlayStation 4, Xbox One, and Microsoft Windows. The remastered edition boasts improved graphics, including enhanced textures, lighting, and animations, making the game look and feel like a next-gen title. The gameplay has also been refined, with tweaks to the combat mechanics, stealth gameplay, and character movements. developed specifically for the PlayStation 4