"Some changes will only activate in specific versions of the game."

Changes include:

🧙 Enchanted books display animated effects representing individual spells, which also combine with each other to create countless variations in the appearance of enchanted books (the more enchants there are on a book, the more intense the glint effect). (Does NOT include tools and armor.) (1.21.5+).
🐟 Buckets containing tropical fish and axolotls display the exact species and color of the creature (1.21.5+).
🏹 Crossbows display the color of the loaded arrow and show three arrows when the Multishot enchantment is used (Bows do NOT work.) (1.21.5+).
🍾 Potions, effected arrows, and crossbows display the effect icon when holding down the |Shift| key (GUI only) (1.21.5+).
✨ Waxed copper items can be distinguished from unwaxed ones in the inventory by an icon displayed when holding down the |Shift| key (GUI only) (1.21.4+).
📯 Goat horns display an animation when used (1.21.4+).
🧨 Fireworks have different texture lengths depending on their flight duration (1.21.5+).
🌠 The active End portal frame displays a gradient that gives the portal a sense of depth (26.1+).
🌺 All plants and several other |X/#| shaped models have received an additional top/bottom texture.
🌿 Leaves are more leafy.
🪴 Vines, glowing lichen, and pale moss vines are wavy.
🌵 Up to version 1.21.4, cacti randomly appear with a flower.
🌱 Sugar cane is denser.
🌾 Ripe wheat is taller.
🎃 Ripe pumpkin stems are slightly orange in color.
🍄‍🟫 Crimson and warped fungus have slightly emissive pixels.
🕸️ Cobweb have a changed model and texture.
🚪 Doors and trapdoors have an additional frame inside the windows.
🌪️ Hoppers have a changed model so that they protrude beyond the block and connect to each other.
🪡 Tripwire hook has a changed model and texture.
🎼 Note blocks display the selected note.
🍯 Bee nests and hives display several levels of fullness.
💡 Glowing blocks have no shadow.
📚 The chiseled bookshelf is randomly arranged with books.
🗑️ Spawners, trial spawners, vaults, and copper grates have internal textures.
🏮 Spawners and trial spawners have emissive pixels.
💀 Heads and skulls are arranged differently in the hands and emit the correct particles when destroyed (except for player heads).
⌚ Respawn timer animation for ender pearls, chorus fruit, and goat horns.
⛏️ Tools show visible signs of wear and tear and are positioned differently in the hands.
🎞️ More animation frames for the brush from a third-person perspective.
🛡️ Improved shield positioning.
🔥 Slightly modified fire model.
💥 Explosion particles rotate in any direction.
🎆 Chests and Ender chests emit the correct particles when destroyed.
🛜 The Sculk shriek gently opens and closes depending on whether it is activated or can summon the Warden.

🎲 3D blocks and items:

⛓️ chain of hanging signs (1.21.4+. Hanging attached version 2 from 1.21.11),
🍀 lily pad (also appears randomly with a flower),
💎 diamond elements of the enchanting table,
🪵 additional piston axis degree,
🍾 brewing stand,
📌 pointed dripstone,
🐸 frogspawn,
🔗 chains,
🔨 mace,
🪜 ladder,
🛒 bars,
🛤️ rails.

🪔 Animated textures:

🔥 furnace,
📀 fire charge,
🧪 dragon's breath,
🕳️ Ender chest,
🩵 prismarine shard,
🍶 ominous bottle,
🕯️ all torches,
📖 additional effects on enchanted books,
🔥 campfires as items,
🐦‍🔥 blaze and breeze rod,
🌟 blaze powder and wind charge,
🪣 buckets with water, lava, fish, and axolotls,
✨ firefly bush as an item, additionally has smoother and unsynchronized animations as a block,
🎨 the experience bar and progress bar on the villager shimmers with the colors of experience (1.20.2+).

🖼️ Changed textures:

🎚️ lever,
🧰 wooden chests,
🪄 enchanted glint,
🎇 experience bottle,
😶‍🌫️ shulker head,
🪚 lower and upper stonecutter texture,
👻 Wither projectiles look like ghosts,
🏹 arrow has a gray flint-like tip,
⏹️ shadow, experience orbs, and guardian rays are pixelated,
🔥 fire on the player's screen has semi-transparent pixels,
🐎 jump bar: horse, camel, and nautilus,
🪟 clear glass has become semi-transparent (1.21.11+),
🎆 End portal frame made of End stone bricks,
🔔 bell supports are made of polished andesite.

🛟 And a few more minor, sometimes imperceptible changes and corrections.

Some game settings are not recommended for comfortable gameplay with this resource pack:

Do not use the graphics settings: | Fast Graphics | and | See-Through Leaves |.
Reduce the | Glint Strength | in the accessibility settings.
May not be compatible with other resource packs.

Author: Wojusek (mine).

I came up with and implemented most of these things myself, as a hobby. I was not inspired by anyone or anything in particular.