RexShader

Rex Shaders
Rex Shaders is a lightweight shader pack that brings a warm, nostalgic look to Minecraft without destroying your FPS. Soft sunlight, reflective water and gentle atmospheric haze, built to run smoothly even on mid-range hardware.

Features
Soft shadows with adjustable quality and softness
Reflective water with animated waves, sky reflections, sun glare and screen-space reflections
Dynamic sky with warm sunrises and sunsets and deep blue nights
Atmospheric fog that thickens during rain
Waving plants: leaves, grass, flowers and crops sway in the wind
Glowing light sources like lava, lanterns, glowstone and froglights, with a soft bloom effect
Underwater, lava and powder snow fog
Custom Nether and End lighting (shadows are disabled there for extra FPS)
Optional depth of field for cinematic screenshots
Performance Presets
Preset Best for
Low Laptops and integrated graphics
Medium (default) Most systems, balanced quality and FPS
High Dedicated graphics cards
Ultra High-end PCs and screenshots (DOF enabled)
Every effect can be tweaked in-game: shadow quality, shadow distance, sun angle, water transparency, wave speed, fog density, bloom, saturation and more.

Tip: If you need more FPS, lower Shadow Quality, Shadow Distance or turn off Water Reflections first.

Prérequis
Minecraft 1.21.x
OptiFine (latest version for your Minecraft version)
Installation
Install OptiFine.
Go to Options → Video Settings → Shaders → Shaders Folder.
Drop the .zip file into the folder (do not extract it).
Select Rex Shaders from the list.
Feedback
Found a bug or visual glitch? Please report it with a screenshot. Feedback helps improve the pack!

Rex Shaders is an original shader pack written from scratch.