OpalFab (OptiFine alternatives on Fabric)
ModpackA modpack with smoother performance, shaders, custom skies, and animations.
Mod grades
How grades workModpacks get no grade of their own, so we show the grades of its mods. Of its 109 graded mods, 96 are graded A or B, 10 C and 3 D to F. Its last update came out 6 days ago, for Minecraft 1.21.1. See the mods
Images
About
OpalFab is a Fabric modpack that brings together alternatives to OptiFine to improve the vanilla Minecraft experience, including performance mods such as Sodium and Sodium Extra. It adds shader support through Iris, connected textures and glass, custom skyboxes, better grass, dynamic lights from held light sources, a zoom feature, and an in-game FPS counter; its visual additions also include glowing ores.
Written from CurseForge . How we write it
Content of this pack
The mods of its newest release (Minecraft 1.21.1 · Fabric, 18 Oct 2026). Each check result is for the latest files of that mod, which may not be the version in this pack.
Cloth Config APIMod · 569.3M downloadsAPassed
Fabric APIMod · 527.1M downloadsAPassed
Architectury APIMod · 460M downloadsAPassed
Entity CullingMod · 425.1M downloadsAPassed
ClumpsMod · 420.4M downloadsAPassed
SodiumMod · 412.7M downloadsAPassed
Jade 🔍Mod · 354M downloadsAPassed
Iris ShadersMod · 337.4M downloadsAPassed
Xaero's World MapMod · 330.9M downloadsBPassed
[ETF] Entity Texture FeaturesMod · 272.2M downloadsAPassed
Complementary Shaders - ReimaginedShader · 253.4M downloadsAPassed
[EMF] Entity Model FeaturesMod · 252.9M downloadsAPassed
FerriteCoreMod · 243.7M downloadsAPassed
LithiumMod · 242.4M downloadsAPassed
Fabric Language KotlinMod · 218.7M downloadsAPassed
3D Skin LayersMod · 202.6M downloadsAPassed
playerAnimatorMod · 198.9M downloadsBPassed
Complementary Shaders - UnboundShader · 194.4M downloadsAPassed
Chat HeadsMod · 172.4M downloadsAPassed
Fresh AnimationsResource pack · 154.5M downloadsAPassed
ContinuityMod · 145.1M downloadsAPassed
LambDynamicLights - Dynamic LightsMod · 111.3M downloadsAPassed
MidnightLibMod · 88.4M downloadsAPassed
KryptonMod · 82.8M downloadsAPassed
EMIMod · 81.1M downloadsBPassedChanges since the previous release
Compared with the release of 17 Oct 2026 for the same platform, Minecraft version and loader. We do not compare the versions of the projects yet.
- Share graded A or B
- down 1 point
Details
- Creator
- GamerPotionDev
- License
- Not known
- Downloads
- 73K
- Created
- 27 Oct 2021
- Official page
- CurseForge
Security
No harmful code found in its projects
We checked all 109 projects and the files in the pack itself, without running them.
Why we show this: a modpack installs the files of its mods, and each mod runs on your computer like any program. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: a modpack has no grade of its own, and each mod's result counts in that mod's grade.
How we checked
- Its projects109 projects
- Files in the pack itself87 settings files, 2 resource, shader or data packs, no mod jars.
Privacy
5 mods send something about you
We read the code of all 59 of its mods, without running it.
Why we show this: a modpack runs the code of its mods, and a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Go online onlyTheir code contacts a web address, for example to check for updates. We found nothing it sends about you.3 mods
- Send nothingTheir code contacts no web address.51 mods
AI
AI used in 4 of the 55 mods we checked
We found an AI tool in them, or their authors declared AI content.
4 mods are not checked yet.
No sign so far that AI was used to make the pack itself
We looked for AI tools in its texts and found none.
We have not read its files and images yet.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.Not on Modrinth.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found6 of 40 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Not read yet
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Not read yet
Compatibility
See all 23 filesPoint at or tap a version to see its loaders.