Outbreak Containment Lost

Outbreak: Containment Lost — v0.4.0 beta

The Containment Overhaul

This is the largest update to Outbreak: Containment Lost so far. Version 0.4.0 greatly expands the pack with new infection content, survival systems, weapons, wildlife, structures, environmental details, building options, world-generation improvements, and extensive performance work.

The infection timeline, infected AI, shaders, controls, configuration files, compatibility systems, and public CurseForge packaging have also been rebuilt or substantially revised.

Alpha Notice: Outbreak: Containment Lost remains in active development. Features, configurations, progression, compatibility, and balancing may continue to change before the full release.

Release Highlights

• Added End-Parasitize and Convert All (E-PCA) as the pack’s primary infection system.
• Reworked infection progression so the outbreak begins around day 3 and escalates over approximately 100 in-game days.
• Removed the temporary artificial 24-infected population limit and restored E-PCA’s intended horde behavior.
• Added Outbreak EPCA Performance Compatibility v1.0.0 — Early Beta for E-PCA-specific AI optimization.
• Added broad expansions to wildlife, survival, weapons, combat, movement, structures, building, visuals, and audio.
• Reworked terrain and structure generation to reduce oversized oceans, excessive frozen terrain, overlapping structures, and unstable far-chunk activity.
• Rebuilt major performance systems for entities, chunk loading, rendering, memory usage, particles, animations, and infected hordes.
• Repaired the public CurseForge export so third-party projects remain official and unmodified while pack-specific fixes are delivered externally.

Infection & Horror Expansion

Added the following major infection, horror, and post-apocalyptic content:

• End-Parasitize and Convert All (E-PCA)
• FracturePoint
• Horror Element Mod
• Still Life
• Warium
• Apocalyptic Arsenal
• Burnt
• Additional infected creatures, environmental hazards, and outbreak-related content.
• More abandoned, ruined, military, industrial, and post-apocalyptic locations.
• Additional horror encounters, survival threats, and environmental storytelling throughout the world.

Infection Progression Rework

• The outbreak now begins around day 3 instead of waiting until day 10.
• Infection activity gradually increases over approximately 100 in-game days.
• Infection progression remains active after day 100.
• Early infection activity begins slowly instead of immediately overwhelming the player.
• New infected threats gradually become more common as the outbreak progresses.
• Later stages can produce significantly larger and more dangerous hordes.
• Infection-related enemies remain the pack’s primary hostile threat.
• Vanilla zombies, skeletons, creepers, and other standard hostile mobs remain enabled but spawn much less frequently.
• Removed the temporary artificial 24-infected population limit.
• Restored E-PCA’s intended horde size and population behavior.
• Natural spawning, spawn eggs, and commands remain functional.
• Infection conversion, progression, and evolution remain enabled.

Outbreak EPCA Performance Compatibility

Added Outbreak EPCA Performance Compatibility v1.0.0 — Early Beta, a separate optimization addon developed specifically for E-PCA 0.3.5 and 0.3.5m.

The addon targets several expensive infected-AI operations that could cause severe server lag, long tick delays, and major FPS drops when large hordes were active.

Performance Improvements

• Fixed infected mobs repeatedly searching for nearby light sources every tick after an unsuccessful search.
• Added a proper retry delay to failed infected light-source searches.
• Reduced how frequently inactive infected scan large areas for potential targets.
• Preserved faster target reactions when infected are already active or fighting.
• Reduced repeated group-behavior calculations performed by large hordes.
• Reduced repeated path-sharing and nearby-infected searches.
• Lowered unnecessary AI processing as the number of active infected increases.
• Improved performance when approximately 30 or more infected are active nearby.
• Reduced severe server-tick spikes caused by repeated infected-AI searches.
• Reduced client FPS drops caused by excessive infected calculations.
• Added compatibility with general entity-performance mods such as Mobtimizations.
• Added support for both singleplayer and dedicated servers.

Preserved E-PCA Behavior

The compatibility addon does not:

• Add an artificial infected-population cap.
• Reduce E-PCA’s intended maximum horde size.
• Disable infected creatures, spawn eggs, or commands.
• Change natural E-PCA spawning rules.
• Alter infection progression, evolution, or conversion mechanics.
• Modify infected health, damage, attacks, or active combat behavior.
• Replace or edit the original E-PCA JAR.
• Contain or redistribute E-PCA textures, models, sounds, or other assets.

Supported Environment

• Minecraft: 1.20.1
• Forge: 47.x
• Java: 17
• E-PCA: 0.3.5 or 0.3.5m
• Multiplayer: Install the addon on both the client and server.
• Singleplayer: Install the addon in the normal Minecraft instance.

Future E-PCA releases must be reviewed and tested before compatibility can safely be expanded.

Additional Entity Performance Improvements

• Added the official Mobtimizations performance mod.
• Improved general entity-targeting and pathfinding efficiency.
• Disabled Spark’s unnecessary constant background profiler.
• Reduced unnecessary background-profiling overhead.
• Improved performance during large hostile encounters.
• Preserved the pack’s intended horde-focused gameplay.
• Avoided using artificial infected limits as a substitute for proper optimization.
• Continued using E-PCA’s original population and spawning systems.

Wildlife & Wilderness Survival

• Added Alex’s Mobs.
• Configured Alex’s Mobs to focus primarily on believable real-world wildlife.
• Retained animals such as bears, seals, crocodiles, caimans, turtles, whales, birds, large cats, and other recognizable wildlife.
• Disabled many fantasy, supernatural, dimension-based, and excessively unusual creatures.
• Added Butchery.
• Added Butchery compatibility for Alex’s Mobs.
• Expanded hunting, food preparation, and wilderness survival.
• Added additional food, farming, cooking, and fishing content.
• Added Farmer’s Respite.
• Added Ecologics.
• Added Project: Vibrant Journeys.
• Added more environmental and seasonal details.
• Added improved campfire and outdoor-survival systems.
• Expanded food-decay and long-term food-storage support.

Survival Systems

• Expanded temperature and thirst mechanics.
• Improved compatibility with Legendary Survival Overhaul.
• Added more survival equipment and environmental protection.
• Expanded clean-water and water-treatment gameplay.
• Improved wilderness preparation and long-term survival.
• Added more containers and survival supplies.
• Improved cold-weather and hot-weather survival balance.
• Expanded early-game resource gathering.
• Added more realistic survival progression.
• Added additional medical, utility, and emergency equipment.

Weapons & Combat

• Added additional TaCZ weapon content.
• Added Fibers Gunspack.
• Added new military, survival, and post-apocalyptic weapons.
• Added Better Combat.
• Added Tactical Movement.
• Added Spartan Weaponry.
• Added Simply Swords.
• Expanded melee-weapon variety, armor, and combat equipment.
• Improved firearm-animation compatibility.
• Improved compatibility between TaCZ, first-person rendering, and movement animations.
• Reduced conflicting combat and movement keybinds.
• Tuned firearm tracers, lasers, and decals.
• Reduced bullet-hole lifetime.
• Reduced unnecessary firearm-effect rendering distance.
• Reduced firearm visual overhead during larger fights.
• Improved combat responsiveness during infected hordes.

New Structures & Locations

Added or expanded:

• Abandoned Structure Aviation
• Abandoned Watchtower Refurnished
• Horror Aviation
• Annoying Horror Structures
• Radio Towers
• Radio Towers and Doomsday content.
• Doomsday decoration content.
• Additional abandoned military locations and industrial ruins.
• Additional infected and post-apocalyptic structures.
• Additional shelters, camps, survival locations, and environmental-storytelling structures.
• Additional YUNG’s structure improvements, including Better Mineshafts, Better Desert Temples, and Better Jungle Temples.

Structure & World-Generation Fixes

• Reworked structure separation and spacing.
• Reduced structures generating inside one another or too close together.
• Reduced structures generating in invalid underground locations.
• Improved compatibility between structures and modded biomes.
• Increased spacing between larger structures.
• Added improved structure-placement protection through Structure Essentials.
• Removed problematic Still Life features that attempted to affect distant or unloaded chunks.
• Fixed runaway underground generation that repeatedly modified neighboring chunks.
• Reduced unnecessary far-chunk world-generation activity.
• Improved terrain-generation stability and chunk-generation consistency.
• Adjusted biome scale so biomes are closer together without becoming extremely small.
• Reduced excessively long stretches of repetitive terrain.
• Reduced excessively large oceans and distant island separation.
• Reduced excessive frozen and snow-covered terrain.
• Improved compatibility between structures and the pack’s terrain-generation mods.

World-Generation Notice: Most of these changes affect new worlds or newly generated chunks. Areas that have already been generated will generally retain their existing terrain and structures.

Movement & Controls Rework

• Reconfigured ParCool to focus primarily on crawling and basic movement.
• Disabled most unnecessary parkour actions.
• Disabled movement systems that did not fit the pack’s intended gameplay.
• Reduced excessive camera movement.
• Disabled movement features that interfered with firearms.
• Improved leaning and tactical-movement controls.
• Reassigned important actions to reduce duplicate keybinds.
• Improved compatibility between Tactical Movement and TaCZ.
• Improved compatibility between movement animations and first-person rendering.
• Added Default Options support for a more consistent control layout.

Building & Decoration

• Added Create.
• Added Immersive Engineering.
• Added Quark.
• Added Supplementaries.
• Added Amendments.
• Added Refurbished Furniture.
• Added Connected Glass.
• Added Continuity.
• Added more furniture, decoration, survival-base equipment, and industrial building content.
• Added more lantern and lighting options, including swinging and dynamic lantern functionality.
• Expanded the Macaw’s building collection with Bridges, Doors, Fences, Furniture, Lights, Paths, Roofs, Stairs, Trapdoors, and Windows.

Visual Improvements

• Rebuilt the included shader packs from their original working versions.
• Corrected Oculus shader-pack loading and archive-layout problems.
• Adjusted nighttime lighting without unnecessarily changing daytime visuals.
• Made nights substantially darker.
• Increased the importance of flashlights, torches, lanterns, and other light sources.
• Better matched the nighttime darkness of Complementary Unbound and Bliss.
• Removed previously broken shader variants.
• Improved weather, foliage, and environmental visual settings.
• Tuned dynamic-light update behavior and rendering distance.
• Tuned entity models and textures for improved performance.
• Preserved visual quality while reducing unnecessary rendering overhead.
• Reduced excessive particles and animation calculations.
• Improved the balance between atmosphere, visibility, and performance.

Audio Improvements

• Tuned Sound Physics Remastered.
• Improved environmental sound occlusion.
• Improved indoor and outdoor sound transitions.
• Tuned footsteps, firearm audio, weather, and ambient audio.
• Reduced unnecessary audio calculations.
• Removed the older Forge Sound Attract setup from the active audio stack.
• Improved compatibility between the pack’s environmental sound systems.
• Reduced excessive sound-processing overhead during large hordes.

Performance & Stability

• Tuned Embeddium for balanced performance and visual quality.
• Tuned ModernFix, FerriteCore, Entity Culling, and AllTheLeaks.
• Tuned dynamic lighting and Sodium-related settings.
• Improved chunk-loading configuration.
• Disabled unsafe speculative chunk loading.
• Reduced unnecessary entity and particle rendering.
• Improved render-distance and simulation-distance balance.
• Reduced excessive animation calculations.
• Improved entity-despawning behavior.
• Reduced memory and resource-loading overhead.
• Removed AI Improvements after restructuring the performance setup.
• Added Mobtimizations for general mob-AI performance.
• Added Outbreak EPCA Performance Compatibility for E-PCA-specific AI optimization.
• Preserved all intended infected spawning and horde behavior.
• Improved performance without simply reducing the number of infected.

Burnt & Chunk-Loading Repairs

• Identified Burnt’s active fire simulation as a major source of server-tick stalls.
• Disabled the unsafe active fire-simulation behavior.
• Prevented Burnt from repeatedly processing unloaded chunks.
• Reduced long server freezes and severe chunk-loading delays.
• Adjusted Better Chunk Loading to avoid overly aggressive chunk requests.
• Disabled unsafe speculative chunk loading.
• Improved chunk loading while travelling and generating new terrain.
• Reduced the likelihood of partially loaded or visually missing chunks.

Compatibility & Error Fixes

• Fixed invalid Butchery models and loot references.
• Fixed malformed animation values.
• Added missing optional-mod recipe checks.
• Repaired malformed fluid and item tags through external data fixes.
• Fixed invalid armor and compatibility references.
• Reduced repeated missing-recipe, missing-tag, and missing-model warnings.
• Fixed several resource, animation, and loot-table errors.
• Corrected structure-compatibility rules.
• Disabled the malformed TaCZ and First-Person compatibility addon.
• Kept the regular First Person mod available.
• Added a separate supported TaCZ first-person compatibility solution.
• Improved First Person and Better Combat compatibility through external configuration.
• Improved compatibility for Entity Culling, First Person, Not Enough Animations, Skin Layers 3D, StableCap, True Fishing, Structory, Simply Traps, TaCZ, E-PCA, and Mobtimizations.

CurseForge Public-Release Repairs

• Restored official, unmodified CurseForge releases of third-party mods.
• Removed previous internal third-party JAR modifications.
• Moved required fixes into external configuration files, datapacks, and resource packs.
• Upgraded Warium from the previously modified 1.2.8 build to the official Warium 1.3.0 release.
• Replaced previous Warium modifications with external Paxi recipe and data overrides.
• Cleaned the generated Connector transformation cache.
• Prevented Connector’s generated cache from being included in the exported pack.
• Validated the external Paxi configuration and data files.
• Removed unmanaged top-level files that should not be included in the CurseForge export.
• Prepared Outbreak EPCA Performance Compatibility as an independent addon instead of modifying E-PCA.
• Preserved the original E-PCA JAR without internal edits.
• Improved compatibility with public modpack-distribution requirements.

Removed or Disabled

• Removed AI Improvements from the active performance setup.
• Removed Forge Sound Attract from the active audio setup.
• Disabled the malformed TaCZ and First-Person compatibility addon.
• Disabled Burnt’s unsafe active fire simulation.
• Disabled problematic Still Life far-chunk features.

Before Updating

• Back up important worlds before installing the update.
• Most world-generation changes require a new world or newly generated chunks.
• Dedicated servers must install all required server-side files, including Outbreak EPCA Performance Compatibility.
• Do not update E-PCA beyond 0.3.5/0.3.5m until compatibility is officially confirmed.

Community & Support

Get help, report problems, share performance results, or suggest improvements through the official WITHHELD STUDIOS Discord:

Discord: https://discord.gg/zFrNaBAMbx

When requesting support, please include your pack version, Minecraft and Forge versions, CPU and GPU, total and allocated RAM, a clear explanation of the problem, your latest.log, and your crash report when one was generated.

Outbreak: Containment Lost is created and maintained by WITHHELD STUDIOS.

Thank you to everyone who tests the alpha, reports problems, and helps shape the outbreak as development continues.