Backporting modern textures to old (and even older) versions of Minecraft. (1.1 to rd-132211!)

Backport Everything attempts to convert modern Minecraft to the older versions!
If you want to see what older versions look like with new textures, this is the pack for you. Test them out on older versions for a laugh, or start an alpha or beta survival world for a simpler time.
Currently updated for 1.21.11 textures, this pack hopes to bring the modern version to the older ones. Currently, the pack supports versions 1.1 and older, going all the way back to the first version in 2009 with pre-classic build rd-132211, which is just grass and cobblestone.
There are other packs available, such as MC New Textures, Modernity and Modern Textures, but I find that they either miss out some textures (e.g. leather armour, fast leaves) or don't support the beta and alpha versions.
Texture packs are not one-click install on Modrinth unlike resource packs, you'll need to install them to your instance (which you may need to create), click the three dots to the right of the start button on the specific instance screen, click 'Open folder', and move the Backport Everything zip file from the 'resourcepacks' folder to the 'texturepacks' folder.
Texture packs are not supported natively before Alpha v1.2.2, but earlier versions can have their textures swapped out using a jar mod. I don't really know why you'd want to play those versions, but it's funny to see them working with the latest textures. If you need help installing versions that don't support texture packs natively, please check the bottom of this page for a guide.
Just a note, rd-20090515 kept crashing for me on launch, and so I can't test it. But since it's just 13 textures, you won't be missing much if you can't run it yourself.
I also didn't change the panorama because it's not something I want to attribute to one version, plus it'll most likely include blocks not in the version you're playing.
This was a fun little project, but there are probably a few texture issues here and there from trying to convert them. If you notice any issues and are willing to let me know, please send me an email at [email protected], and I'll get it fixed. See below for a list of known bugs which will get fixed soon™.
Note: The Minecraft logo on the title screen is not modifiable.
Note: The clock texture is only modifiable with MCPatcher or Optifine.
Note: Some versions of the texture pack don't have colour formatting in the pack.txt file, as an undesired character shows before the coloured text.
Note: Water & lava animated textures have been added, but they require either Optifine or MCPatcher to appear in-game.
There are currently no known bugs.
Currently, this pack supports Optifine & MCPatcher's connected textures as well as animated lava & water. If you have any other suggestions for mods, feel free to send me an email.
Big thank you to Julien Kerboeuf for creating the Minecraft Resource Extractor. It definitely helped speed up a lot of the tedious parts. Thank you also to the Mojang Art Director JAPPA for the texture update for 1.14!
To add textures to old old versions that don't support texture packs, you'll need to add it as a jar mod using Prism Launcher or MultiMC, they're pretty much the same, but Prism Launcher has fancy extra features.
Unfortunately, Modrinth does not support jar mods for older versions at the moment.
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