The Sims 4 is famous for its "Create-A-Sim" (CAS) engine, which revolutionized the franchise by allowing players to click and drag body parts directly. However, as any veteran simmer knows, the vanilla game has strict "safety rails." There are limits to how thin, muscular, or wide a Sim can be.
Ready to break the mold—literally? Go forth and slide to the extreme.
Where to find Maxis-Match clothes that work well with sliders? extreme body slider mod sims 4
Further Reading:
Clipping: When you push a Sim’s body too far, clothes (especially base game ones) may "clip" or bleed through the skin. Most CC creators design for standard bodies, so extreme proportions may require specific "slider-compatible" clothing. The Sims 4 is famous for its "Create-A-Sim"
Beyond the Basics: Extreme Body Customization in The Sims 4 The Sims 4
Best Practices for Users
Players Unleashed! Modding The Sims and the Culture of Gaming " (PDF via UTUPUB