2.1.1

• Temporary fix for first launch crash
• Fixed tree leaves glitching (thanks, Altirix!)
• Updated Fabric API

2.1.0

It is time to finally release Fabulously Optimized for Minecraft 1.17.1! Here are the major updates from 1.9.1 to 2.1.0:

New mods

• Iris - Optifine shaders! See here for the recommended ones.
• LambdaBetterGrass - Optifine's "better grass"!
• CustomEntityModels - Optifine's custom entity models (partial support, see mod description)
• AdvancementInfo - bigger and more detailed advancement screen
• Better Mount HUD - improves the HUD while riding a horse, like in Bedrock Edition
• Reese's Sodium Options - makes the graphics settings vertical to make sure all options fit and look good
• WI Zoom - a simple, scrollable zoom mod
• Indium - adds Rendering API to Sodium, which makes some important parity mods work
• YOSBR - keeps your settings across modpack updates

Removed mods

• Ok Zoomer - servers can now disable or limit your zoom, I think you should be in charge of that
• Custom Fog - Sodium Extra now provides a simpler fog management experience
• Smooth Scrolling Everywhere - seems to be abandoned
• Phosphor - not yet updated

Other changes

• New default options (read more)
• Curseforge pack is now 100% Fabric (faster launch and better mod management)
• An auto-updating MultiMC pack is available on GitHub
• Now using semantic versioning
• All mods updated
• For more changes between alpha and beta versions, see the changelog

Changes from beta 4 to release

• Added AdvancementInfo, Better Mount HUD, Reese's Sodium Options
• MultiMC (auto-update) is now split by version for future-proofing, please re-download if you use it
• Updated Iris+Sodium, Lithium, Sodium Extra, Custom Entity Models, Not Enough Crashes, Mod Menu, Fabric API, Fabric Language Kotlin, Architectury API

2.1.0-beta.4

Added

• LambdaBetterGrass (Optifine's "better grass"!)
• CustomEntityModels and CompleteConfig (Optifine's custom entity models, in alpha though)
• Colormatic (water/biome colors, FO 1.9.1 parity)
• FastChest and Better Beds (were removed in the previous beta)

Removed

• Enhanced Block Entities (postponing the addition due to mod compatibility bugs)

Updated mods: FerriteCore, Mod Menu, Fabric API, Architectury API

2.1.0-beta.3

It's time to test Indium! Please let me know how it goes: [the poll has ended]

Changes from beta 2

• Added Indium (rendering API, allows for more parity mods in the future)
• Added Enhanced Block Entities (makes chests, signs, bells and beds render faster)
• Removed FastChest and Better Beds (replaced by Enhanced Block Entities)
• Removed Custom Fog (Sodium Extra provides a simpler experience for most people)
• Mods updated: Architectury API, Cloth Config API, Dynamic FPS, Fabric API, Fabric Capes, LambDynamicLights

Thanks for 100 000 downloads!

2.1.0-beta.2

Changes from beta 1

• Replaced Sodium with Iris+Sodium for shaders and bugfixes
• Reset global graphics to Fancy to make Cull Leaves work
• Mods updated

2.1.0-beta.1

Changes from alpha 3

• Added Sodium and Sodium Extra
• Removed Canvas
• Removed AntiGhost keybind to prevent accidental presses (you can use /ghost)
• Updated mods

2.1.0-alpha.3

Changes from a2

• (No Sodium yet)
• Added Custom Fog back
• Enabled Cull Leaves by default
• Mods updated
• Now using semantic versioning

2.1.0a2

Changes from a1

• (No Sodium yet)
• Readded 'Slight' Gui Modifications and Fabrishot
• Fixed version in the main menu
• Updated mods

2.1.0a1

First alpha for 1.17.1!

• Temporarily added Canvas again because Iris+Sodium broke with 1.17.1
• Added FerriteCore back
• Removed mods that broke with 1.17.1: Iris+Sodium, 'Slight' Gui Modifications, Fabrishot
• You cannot see the version in the main menu at the moment
• Updated mods

2.0.0b4

• Added Iris with Sodium! (yes, FPS boost and Optifine shaders!)
• Set the default graphics to fast for general performance improvement
• Re-enabled dynamic light for entities
• Updated mods
• Removed Canvas
• FO is currently still in beta because 1.17.1 is coming soon and Sodium Extra is not there yet