•1.12
Additions:
Items:
Grappling Hook, Shadowflame Bow, Shadowflame Knife, Harp, Magic Harp, Gold Armor, Magic Mirror, Ankh Shield, Daybreak, Solar Eruption, Solar Flare Pickaxe & Hamaxe, Heart, Gold & Shadow Keys, Wizard Hat, Witch's Broom, Eye of Cthulhu Treasure Bag, and Shield of Cthulhu
NPCs:
All demon eye variants
Tiles:
Planked walls, Hallowed, Crimson, and Corrupt Grass Walls, Sandstone Brick blocks & walls, Ebonstone Brick blocks & walls, Gold Ore, Silver Ore, and Forest Trees
Status Effects:
Ironskin, On Fire!, Poison, and Potion Sickness
Miscellaneous
-Defense inventory UI
-Breath bubble UI
-Fixed some UI not working after 1.4.4
-Tiles for forest biome splash screen
-Minor tweaks to some dusts
-Added a little bit of trolling

Resprites:
Items:
Light's Bane, Blood Butcherer, Blade of Grass, Muramasa, Volcano (Fiery Greatsword), Night's Edge, Gold Axe, Gold Sword, Terrarian, True (Awoken) Excalibur, Horseman's Blade, Solar, Vortex, Stardust, and Nebula fragments, Aqua Scepter, Throwing Knives, and Suspicious Looking Eye
NPCs:
Major reshade to Eye of Cthulhu, tweaks to Servants of Cthulhu and Demon Eye
Tiles:
Changed shadow chest's palette
Miscellaneous:
Tweaked shading on Starfury, Waraxe of the Night, Enchanted Boomerang, Revolver, Sniper Rifle, Katana, and Copper Shortsword
Gold palette updated
Demonite palette updated
Tweaked silver armor
Smoothed the edges of the grass wall template sprites

You can find a few of the new sprites in this spoiler:
https://cdn.discordapp.com/attachments/824791383213604889/1030765409873428490/PolarisUpdateSheet.png

•1.11
-Fixed 1.4.4 breaking the furnace sprite (bruh)

•1.10
-Found a better way to hotfix to 1.4.4
-Added crimson & corruption mud grass
-Added hell grass
-Fixed new furniture from 1.4.4 being invisible

•1.9
-Fixed an issue where certain frames of snow blocks lacked the detailed texture from 1.8
-Outlines for copper items are now more orange
-Tweaked muramasa, cobalt bar, and cobalt repeater shading
-Resprited crimtane bar, magic quiver, soaring insignia, starlight, eventide, nightglow, terraprisma, and terra blade
-Added flower vines, enchanted boomerang, kaleidoscope, rainbow rod, several bottle tiles, forest pots, and cobalt naginata

•1.8
-Added crimtane ore, bar, and toolset
-Added cave, jungle, and hell bats
-Added bird npc
-Added hellstone ore, bar, and obsidian, and revised the hellstone item palettes
-Added ice blade, bullets, and pickaxe axe
-Resprited pwnhammer and revised snow

-Added a very slight tint to glass walls to increase the sprite's visibility. It may be a small change, but it had to be addressed sooner rather than later.

-Resprited Zenith, Terraprisma, Katana, and lowered contrast on crimson grass
-Added wand of sparking, revolver, shurikens, throwing knives, glowsticks and sticky glowsticks, cross necklace, last prism, and glass blocks

-Added wooden doors, silver armor (visuals and items), bloody machete, and wraith
-Updated demon eye shading to be consistent with the Eye of Cthulhu
-The gold outline shade is now more consistent with the rest of the palette
-The silver shortsword now uses the same shading as the gold shortsword

-Added Starfury, Magic Missile, all healing & mana potions, Philosopher's Stone, Sniper Rifle, Lightning Boots, Shadow Chest item & tiles, and locked Gold Chest

-Resprited Blade of Grass and Muramasa
-Added Demonite Ore (item), Demonite Bar, the Demonite toolset, Unholy Arrows, Thorn Chakram, and Aqua Scepter