YouTuber SlimX has released a 25-minute video detailing the behind-the-scenes mechanics of Baldur's Gate 3's first act. Key points include Larian Studios' solutions like a designated area for essential NPCs and a "magical teleporting death journal" to guide players to Act 2. The game features a unified NPC data system, ensuring player choices, such as selling items, carry over throughout the game. The video also reveals hidden elements like the "realm of naked men," character creation backgrounds, and cut NPCs, including a Tiefling scam artist named Nerela. Additionally, it discusses a field of portrait backgrounds in a void, which are used for character icons, and notes minor bugs related to these portraits. SlimX hints at creating more content for future acts of the game.