This is Brush-Up! Brush-Up aims to improve and brush up many textures that felt either a bit outdated, or just a little out of line.

Modrinth Page

Changes

Items

• Brush has been tweaked
• All dye items (tweaked and retextured both to better help differentiate & to better match their dyed-block colours)
• Azalea, Dripleaves, & Spore Blossom have unique item textures
• Blaze Rod & Powder have been updated
• Enchanted Golden Apple (now called Enchanted Apples) uses its own item texture
• Glass Bottle, Potions, and Experience Bottle have been tweaked
• Music Discs have been updated
• Bowls, Buckets, & Flower Pot have been tweaked
• Nether Wart Item has been retextured
• Pink Petals' item has been retextured
• Spyglass (Handheld position now matches Bedrock Edition)

Blocks

• All coloured blocks (concrete, concrete powder, terracotta, glazed terracotta, wool)
• Banners have been tweaked
• All Stripped Logs have been retextured
• Chests have been retextured
• Sea Lantern has been retextured
• Fire, Lava, & Magma have been updated
• Nether Portal (including respawn anchor top texture) has been updated
• Water has been tweaked
• Torches have been updated
• Beacon has been remodelled and retextured
• Cherry Door, Trapdoor, Leaves, Sapling have been tweaked
• The models for pink petals has been tweaked
• All Dirt blocks have been updated
• Grass's top texture has been tweaked
• Infested Stones have slightly different textures
• Decorated Pot has been tweaked
• Flower pot has been updated
• Sculk, Sculk Sensor, Sculk Shrieker have been tweaked
• Moss has been tweaked
• Spore Blossom has been retextured
• Chorus Plant & Flowers have been remodelled & retextured
• Dragon Egg has been updated with a remodel & retexture

Entities

• Allay & Vex have been tweaked
• Cows have been tweaked
• Creepers have been updated & retextured
• End Crystals have had their bases tweaked
• Endermen & Endermite have been updated & retextured
• Silverfish has been updated
• Guardian & Elder Guardian have been tweaked & retextured
• Bats have been retextured
• Frogs have been tweaked
• Sheep have been tweaked
• Shulkers have been updated & retextured
• Signs have been updated to match their hanging variants
• Sniffer has been tweaked
• Blaze has been tweaked

Particles

• Cherry Leaves now use their own textures
• Bubbles have been updated
• Effect particles have been retextured
• Lava bubble has been retextured
• Powder Snow snowflakes now use their own textures
• Sweep has been retextured

Miscellaneous

• The "darker" palettes of armour trims have been tweaked so that the lighter colours aren't just brightness-lowered versions of their originals
• The water breathing and darkness effect icons have been tweaked
• The spyglass scope texture has been tweaked

Further changes may be found in the changelogs of the respective versions :)