RCD800's Mods: Liminal Borders

An atmospheric, server-authoritative world border containment suite for Minecraft Forge 1.20.1. Replaces immersion-breaking barriers with creeping proximity fog, an impenetrable void wall, seamless "Lost Woods" turnaround physics, proximity acoustics, and independent per-dimension boundaries.

🌌 Overview & Modpack Context

In expansive adventure, RPG, and multiplayer modpacks, hard world boundaries are essential to prevent runaway chunk generation and control server storage. However, vanilla Minecraft's default world border—a pulsing blue forcefield—often shatters immersion and lacks per-dimension flexibility.

Liminal Borders transforms the world boundary into an atmospheric psychological barrier:

• Creeping darkness and pitch-black void fog swallow the horizon as players approach the frontier.
• Approaching within 15 blocks immerses players in an escalating darkness shroud.
• Walking into or pressing against the boundary triggers a disorienting, angle-preserving reflection bounce that smoothly turns players back toward civilization.
• Distant low-frequency hums and spatial audio anomalies warn explorers of the world's edge.
• Every dimension maintains its own persistent, independently configurable world border.

⚡ Core Features

• Per-Dimension World Borders: Server-authoritative, persistent world borders stored independently per dimension (ServerLevel). The Overworld, Nether, End, and modded dimensions (Twilight Forest, Undergarden, Blue Skies, Deeper and Darker) can each have unique centers and radii.
• Atmospheric Foggy Mode ("Lost Woods" Turnaround): Replaces the generic forcefield with creeping, distance-anchored proximity fog and seamless reflection mechanics that bounce players back cleanly without harsh damage spikes.
• Gapless Solid Void Wall (solidBorderWall): In FOGGY mode, renders a monolithic, impenetrable pitch-black barrier. Provides a stunning double-barrier effect in vanilla and ensures the boundary is 100% visible and un-see-through even under Oculus / Iris shaders.
• 15-Block Proximity Darkness Combo: Approaching within 15 blocks of any border applies a throttled Darkness and Blindness combo, ensuring complete visual containment across all shaderpacks and render distances.
• Boundary-Hugging Reflection: Walking up to and pressing against the barrier (distance <= 0.45) safely reflects player momentum and orientation back inward.
• Escalating Penalty System (Liminal Dissolution): Stacking custom status effect that tracks repeated boundary trespassers with configurable true damage scaling.
• Proximity Spatial Audio: Seamless distance-attenuated low-frequency ambient hum and distant spatial anomalies when drawing near the world boundary.
• Staff & Vanish Freedom: Spectators are 100% exempt from all barrier sounds, fog, and turnaround physics. Creative staff members are exempt from fog, blindness, and shroud effects for inspection while retaining turnaround testing.
• Shader-Safe Custom Forcefield Mode: Alternative mode offering custom RGBA color tinting and opacity controls without @Redirect conflicts under Embeddium and Oculus.

📜 Commands & Scripting API

Unified /wb command structure with dimension targeting, designed for console automation, KubeJS scripts, and FTB Quests:

• /wb get [dimension] — Displays the border center and size for the specified dimension.
• /wb set <size> [dimension] [timeInSeconds] — Changes the border size with optional gradual transition.
• /wb center <x> <z> [dimension] — Repositions the border center in the specified dimension.
• /wb reset [dimension] — Resets the border to vanilla defaults.

🔧 Configuration

All settings are fully configurable in config/rcd800_liminal_borders-common.toml:

• visualMode: Select between FOGGY, FORCEFIELD, VANILLA, or OFF.
• solidBorderWall: Enable/disable the gapless pitch-black void wall in FOGGY mode.
• fogCreepDistance & fogStartMultiplier: Tune the distance and density curve of the border fog.
• audioProximityDistance & audioPeakVolume: Customize ambient hum fade-in distance and volume.
• fogPenaltyDamagePercent: Configure true damage percentage on repeated crossings.
• shroudDurationTicks: Customize blindness shroud duration during turnaround.

🛡️ Compatibility & Engineering Guarantee

• Embeddium & Oculus Compatibility: Built using safe injections and Forge client rendering events (ViewportEvent.RenderFog). Completely eliminates crashes and shader desynchronizations.
• Refmap Isolation: Dedicated refmap configuration (rcd800_liminal_borders.refmap.json) preventing ClassLoader collisions across modpacks.
• InControl Integration: Seamlessly pairs with InControl area rules to prevent wild mob spawns beyond the border while preserving near-border dungeons and structure spawners.
• Zero Tick Overhead: Boundary checks, status effects, and audio attenuation are strictly throttled and optimized for 20 TPS server performance.
• Complete Localization: Full native language support in English (en_us), Brazilian Portuguese (pt_br), and European Portuguese (pt_pt).

👥 Credits & Inspirations

• Design & Engineering: RCD800 — Creator of RCD800's Mods: Liminal Borders.
• Conceptual Inspirations:
  • DimWorldBorder (Joe Clack) — Conceptual per-dimension border persistence.
  • Saros' Worldborder Customizer (Sarocesch) — Custom forcefield shader and color concepts.
  • Foggy Border (Dev0Louis) — Proximity fog boundary concept.

⚖️ License

All Rights Reserved (ARR). Proprietary intellectual property of RCD800.