Spectrum 1.9.0 - Welcome to Spectrum on 1.21.1!

This port has taken forever, since Minecraft changed a lot in recent updates, so we had to rewrite almost every class in the entire mod. 1.21.7 isn't looking like less work, either. But since you all enjoy Spectrum so much it's very much worth it. At this point big thanks to electro_593 and noaaan for helping out a lot with this port.

Early Potion Workshop!

The Potion Workshop is now unlocked in earlygame, after collecting Mermaid's Gems & Quitoxic Reeds - the Stratine requirement was removed. Since the vanilla Brewing Stand requires Blaze Rods, this is a nice alternative for Players that don't vibe with the Nether too much or play on peaceful.

To keep the power level down, all non-vanilla reagents get unlocked starting the midgame advancement tree.

Player Memories!

When using the Staff of Remembrance on a Player, you can now get a Memory of them. Hatching that memory makes the player teleport back to the position of the Memory. Using the 'Memory to Head' recipe you can now finally get Player heads, making Hardcore Revival a lot more accessible. I've also made sure to add a new funky advancements, if you try a certain cursed thing with that :tomfoolery:

Texture Overhaul

Most Spectrum textures use the ones that were previously included in the 'gen1' texture pack again. Especially the new Calcite and Basalt textures did not mesh too nicely with their vanilla counterparts. Some blocks, like the Perservation Blocks, Chimes, Pylons, Azurite ore and more still retain their updated textures and in other cases (like Shimmerstone particles) the visuals have been merged to create a vanillay, yet consistent look. Other blocks have gotten an overhaul - Stardust Blocks now sparkle, for example. Gemstone Blocks are back to their former selves, while their 'pillary' versions got their dedicated decorative blocks, actually called '<Gem> Pillar'. The Neolith item got smaller and it's block texture swapped with radiating ender, emphasizing its non-attributable properties as a null-block.

Of course you can still use the previous textures which are now included in a separate texture pack.

Improvements

Added mob heads for all 1.21 mobs
Noxwood and Weeping Gala doors & trapdoors actually look good (had broken side textures before)
You can now dispense Ender Splices to teleport players
Manors are quire a bit more common
Erasers are now immune from some damage types, while taking immensely more from others (electrocution, falling blocks, getting snacked, ...)
Titration Barrel Filling is now automatable
Le Fishe Au Chocolat can now be played in jukeboxes
Inertia doesn't reset in annoying cases
Divinity is now even more op
End Portals can be any shape (configurable)
Mob Heads now support translucency (slime head,...)
Fluid collisions got fixed and quite a few more blocks can now be gotten that way
Primordial Fire damage got nerfed
The Spirit Instiller looks decent in the inventory again
Aether Vestiges now are a powerful, albeit situational, potion reagent
Overgrown Slush is now renewable
Updated lots of sounds with custom subtitles
'Inclurable' is now called 'Severe'... since incurable effects were never incurable in the first place
The Artisan's Atlas now respects common tags for structure blacklisting
'Liquid Mud' is now falled 'Sludge', to not clash with vanillas Mud
Ragents now have tags, so you can look them up in recipe viewers
Shooting Star spawns are now random on their x/z axes (previously they always spawned exactly on top of the player)
Cats can now be fed Craswfish
...and many more

Bug Fixes

Recipes that turned one tool into another (like Malachite->Glass Crest tools) don't duplicate their source item anymore if you use Efficiency Slopes
~100 bug fixes, far too many to list here