Modpack OpalFab (OptiFine alternatives on Fabric) by GamerPotion

OpalFab is a Fabric based Modpack for Minecraft versions 1.17.1, 1.18.2 & 1.19.2 that features mods that are great alternatives to the functions of OptiFine.

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Features

(Your vanilla experience will be further improved thanks to the following features)

• Latest Update 1.19 - Enjoy the latest update
• Performance Updates - Enjoy performance like you did in OptiFine thanks to mods such as Sodium & Sodium Extra. There are more performance mods installed as well.
  
• Connected Textures
• Connected Glass
• Zoom Function
• FPS Counter - View your FPS in-game!
• Shaders Function - Enjoy the use of shaders thanks to the Iris Shaders mod
• Dynamic Lights - Hold a torch/light based item and the ground around you should illuminate.
  
• Custom Skybox
• Better Grass
• And more! (click the Mods button in the game's main menu to see all the mods)
• Check out some of the screenshots in the Images section.

Additional Information (Important!)

• Zoom key is 'C'.  Hold C to zoom, similar to OptiFine.
  
• Visit https://minecraftcapes.net and activate your Cape
• Some shaders will not work with custom skybox, so disable the skybox resource pack before using shaders.

For detailed explanations, also check out LambdAurora's list of mods - https://lambdaurora.dev/optifine_alternatives/