Preparing Your Modpack
Overview
Cleanroom Loader is compatible with the vast majority of Forge mods and will usually run them without issue.
However, some mods remain deprecated, redundant, or outright incompatible—either because they’ve been superseded by better alternatives or because they introduce critical problems.
To prepare your modpack for Cleanroom Loader, review the lists below and make replacements where necessary.
Incompatible / Problematic Mods on Cleanroom Launcher
| Mod | Reason | Action |
|---|---|---|
| AdvancedShader | Binary patching, incompatible. | 🚫 Remove |
| Essential.gg | Patched but causes many issues. | ✅ Use Lan UPNP (Non-Proxy option) or E4MC Retro (Proxy Option) |
| FoamFix | Outdated and prone to cause issues in Cleanroom Environment | ✅ Use VintageFix |
| Gnetum | Prone to cause issues | ✅ Use StellarCore |
| Mouse Tweaks | Outdated and prone to cause issues | ✅ Use Mouse Tweaks Unofficial |
| Phosphor | Incompatible | ✅ Use Alfheim Lighting Engine / Hesperus |
| Polyfrost series | Awaiting official fixes. | — |
| Raw Input | Already included in Cleanroom. | 🚫 Remove |
| Secret Rooms | Has an issue with updater | 🚫 Disable the update checker in config file |
| SerializationIsBad | Redundant. Modern Java versions fix the issue this solves | 🚫 Remove |
| TexFix | Merged and rewritten in CensoredASM | ✅ Use CensoredASM |
| VanillaFix | Merged and improved in CensoredASM | ✅ Use CensoredASM |
WARNING
If your modpack uses Bansoukou 4, make sure to run the instance at least once before installing cleanroom loader so its patches are applied.
Performance / Memory optimization mods
The most important optimization mods for Minecraft 1.12.2 can be summed up to the following list:
- CensoredASM : Huge optimizations that are targeted at Minecraft 1.12.2
- VintageFix : Load time and RAM use improvements for Minecraft 1.12.2
- Universal Tweaks : A community project to consolidate various bugfixes and tweaks into a single solution for Minecraft 1.12.2
- Stellar Core : Provides extensive bug fixes, performance improvements, and additional features across a wide range of mods
Note
Universal Tweaks supersedes a lot of mods which will be mostly not mentioned here. This can be observed via an in-game warning or by looking at the incompatible mods list Here.
Render optimization mods
The most prominent Render optimization mods for Minecraft 1.12.2 are:
- Optifine
- Celeritas (Requires Cleanroom Loader, use the version 2.3.0 since 2.4.0 breaks with CensoredASM)
- Nothirium (Also requires Naughthirium)
Note
Celeritas and Nothirium do decrease ram usage and footprint, while Optifine may increase ram usage and will lengthen load times.
Stress Test Results
In a simulated heavy-base scenario, we benchmarked the aforementioned mods against each other, and therefore rank their performance according to which gpu is used:
- NVIDIA GPUs →
Nothirium > Optifine > Celeritas - AMD GPUs →
Celeritas > Optifine > Nothirium - Intel Integrated Graphics →
Celeritas | Optifine
Note
Performance varies depending on your hardware and drivers. Test all three mods to see which provides the best results for your system.
Superseded mods
Note
These mods are not necessarily incompatible with Cleanroom loader, but have been superseded by newer forks or do not present any benefit, so we recommend you use to follow the actions we recommend
Library Mods
| Mod | Reason | Recommended Action |
|---|---|---|
| Custom Mob Spawner | Breaks mob spawns from almost every other mod | 🚫 Remove |
| FermiumASM/ BlahajASM | Clone of CensoredASM that disables fixes with Dynamic Trees and depends on FermiumBooter. | ✅ Use CensoredASM |
| FermiumBooter | Clone of MixinBooter with less benefits and worse implementation, might not be compatible with newer MixinExtras stuff. | ✅ Use MixinBooter |
| Forgelin | Outdated | ✅ Use Forgelin-Continuous |
| LibrarianLib | Will not work correctly with Forgelin-Continuous | ✅ Use LibrarianLib-Continuous (May break Wizardry Animations, Revert to LibrarianLib + Forgelin if present) |
| MixinCompat | Not Required with latest Mixinbooter | 🚫 Remove |
| NormalASM | Outdated fork of CensoredASM with no meaningful changes. | ✅ Use CensoredASM |
Content Mods
| Mod | Reason | Recommended Action |
|---|---|---|
| AcademyCraft | Abandoned | ✅ Use Academycraft UES |
| Advanced Rocketry | Outdated and buggy | ✅ Use Advanced Rocketry - Reworked |
| Aether II | Gets packaged with Phosphor which breaks compatibility with Alfheim Lighting Engine / Hesperus | ✅ Use Aether II: Phosphor Not Included |
| Aetherium Ashen Armor | Merged into Aetherworks Unofficial Extended Life | ✅ Use Aetherworks Unofficial Extended Life |
| Aetherworks | Outdated | ✅ Use Aetherworks Unofficial Extended Life |
| Alchemistry | Outdated | ✅ Use Alchemistry - Redox |
| Applied Energistics 2 | Outdated | ✅ Use AE2 Unofficial Extended Life |
| Binnie's Mods | Outdated | ✅ Use Binnie's Mods Patched |
| Crimson Revelations | Outdated | ✅ Use New Crimson Revelations |
| Davinci Vessels | Outdated | ✅ Use Valkyrien Skies |
| Deadly Monsters | Outdated and no longer available in CurseForge | ✅ Use Deadly Monsters Patched |
| Dynamic Trees | Outdated | ✅ Use Dramatic Trees |
| Earthworks | Outdated and marked as abandoned by CurseForge | ✅ Use Earthworks Unofficial Extended Life |
| Embers/Embers Rekindled | Outdated, may cause issue | ✅ Use Embers Unofficial Extended Life |
| Engineered Golems | Merged into Congrega Mystica with bugs fixed | ✅ Use Congrega Mystica |
| Expanded Arcanum | Merged into Congrega Mystica with bugs fixed | ✅ Use Congrega Mystica |
| Mekanism | Outdated | ✅ Use Mekanism-CE-Unofficial or Mekanism Community Edition |
| Mo' Creatures | Outdated, requires Custom Mob Spawner and has numerous gamebreaking bugs | ✅ Use Mo' Creatures Extended |
| Modular Machinery | Outdated | ✅ Use Modular Machinery: Community Edition |
| MrCrayfish's Furniture Mod (Legacy) | Outdated | ✅ Use MrCrayfish's Furniture Mod (Legacy 1.12.2) |
| Mutant Beasts | Outdated | ✅ Use Mutant Creatures Legacy |
| Natura | Outdated, impacts performance | ✅ Use Natura Legacy |
| Nature's Aura | Outdated, impacts performance | ✅ Use Nature's Aura Simplified |
| OpenBlocks | Outdated | ✅ Use OpenBlocks Reopened |
| Pillar | Outdated | ✅ Use Pillar Patched |
| Railcraft (Release version) | The mod is abandoned and the latest beta version has more bugfixes | ✅ Use Railcraft Beta |
| RPGLoot | Outdated | ✅ Use RPGLoot Patched |
| Rustic Thaumaturgy | Merged into Congrega Mystica with bugs fixed | ✅ Use Congrega Mystica |
| Seared Ladder (Backport) | Merged into Tinkers' Antique | ✅ Use Tinkers' Antique |
| Soot | Outdated | ✅ Use Soot Unofficial Extended Life |
| Soul Shards Respawn | Outdated | ✅ Use Soul Shards Respawn Patched |
| Techguns | Outdated and unfinished | ✅ Use Techguns-CE |
| Thaumic Wonders | Outdated | ✅ Use Thaumic Wonders Unofficial |
| Thicc Entities | Outdated, notably crashes with Aqua Acrobatics | ✅ Use Entifier |
| Tinkers Construct | Outdated | ✅ Use Tinker's Antique |
| Tinkers' Arsenal | Outdated and no longer available in CurseForge | ✅ Use Tinkers' Arsenal Reloaded |
| Tough Expansion | Has an RCE exploit | ✅ Use Survival Tools |
| Twilight Forest | Outdated | ✅ Use Twilight Forest: Deforestation Edition |
| Wizardry | Latest version causes incompats | ✅ Use Wizardry 0.11.1 |
Performance Mods
| Mod | Reason | Recommended Action |
|---|---|---|
| BetterFPS | Breaks core functionality. | 🚫 Remove |
| Betterer Biome Blender/Better Biome Blender | Does not provide meaningful change | 🚫 Remove |
| Clumps | Outdated | ✅ Use Fixeroo |
| FastFurnace | Merged and rewritten in CensoredASM | ✅ Use CensoredASM |
| FastWorkbench | Merged and rewritten in Universal Tweaks | ✅ Use Universal Tweaks |
| GPU Tape | Provides no benefit | 🚫 Remove |
| Multithreaded Noise | Known to cause crashes. | 🚫 Remove |
| Noisethreader | Known to cause crashes and mismatched registries. | 🚫 Remove |
| Performant | Empty jar that does nothing. | 🚫 Remove |
| Redirectionor | Provides no real performance benefit. | 🚫 Remove |
| Relictium | Outdated Vintagium clone, See Performance Mods. | — |
| Spark / Spark Unforged | Spark: Outdated Spark Unforged: Backport of modern Spark with half the features removed. | ✅ Use Flare |
| Surge | Uses deprecated methods, does not improve performance at all | ✅ Use Universal Tweaks |
QoL Mods
| Mod | Reason | Recommended Action |
|---|---|---|
| AppleSkin | Outdated | ✅ Use LemonSkin |
| AttributeFix | Merged and rewritten in Universal Tweaks | ✅ Use Universal Tweaks |
| Born in a Barn | Fix already included in Forge, does nothing when installed | 🚫 Remove |
| DupeFix Project | Incompatible with MixinBooter | ✅ Use Universal Tweaks |
| Eigencraft Unofficial Patch / MUP | Outdated, will cause incompats with other mods | ✅ Use Universal Tweaks |
| Hot or Not | Outdated | ✅ Use Hot or Not Plus |
| Immersive Craft | Outdated | ✅ Use Immersive Craft Patched |
| JustEnoughIDs (JEID) / NotEnoughIDs (NEID) | Outdated | ✅ Use RoughlyEnoughIDs (REID) |
| JustEnoughItems (JEI) | Outdated | ✅ Use HadEnoughItems (HEI) |
| MiniEffects | Outdated | ✅ Use MiniEffects-Legacy Extended Life |
| Mod Director | Outdated | ✅ Use FileDirector |
| NetherPortalFix | Rewritten implementation in Universal Tweaks | ✅ Use Universal Tweaks |
| RandomPatches | Known to cause crashes. | ✅ Use Universal Tweaks |
| RLFoliage /BetterFoliage | Causes a lot of incompats and performance issues | ✅ Use Universal Tweaks |
| SmoothFont | Breaks some mods. | 🚫 Remove |
| Thaumic Fixes | Only fixes one bug and may cause incompats with other mods | ✅ Use Thaumcraft Fix |
| ThaumTweaks | Outdated and problematic mod and will cause incompats with other mods | ✅ Use ThaumicTweaker |
| Tips | Outdated | ✅ Use AnotherTips |
Should Have
A list of companion mods to further improve your experience with other mods
| Mod | Reason | Recommended Action |
|---|---|---|
| AtomicStryker's Battle Towers | Has a good amount of bugs | ✅ Add Battle Towers Fixes |
| HadEnoughItems (HEI) | Some mods have overlapping issues with HEI's interface | ✅ Add JEI Area Fixer |
| IC2 EXP | Has a good amount of bugs | ✅ Add IC2 Patcher |
| Industrial Foregoing | Has a good amount of bugs | ✅ Add IFPatcher |
| Railcraft | Has a good amount of bugs | ✅ Add Railway Depot Worker |
| Thaumcraft 6 | Bugs and lack of integration | ✅ Add Thaumcraft Fix and ThaumicTweaker (Add Congrega Mystica for more integration) |
| VoxelMap | Has a good amount of bugs | ✅ Add VoxelMap Fixes |
| Witchery: Resurrected | Base mod is not usable | ✅ Add Witchery: Companion |
Thermonuclear_Minecraft_Engineer