Minecraft "Skull of Fire" painting seed tutorial

Original Reddit post: https://www.reddit.com/r/Minecraft/comments/iqg3ey/the_original_screenshot_seed_of_the_minecraft/
Video reveal: https://www.youtube.com/watch?v=d8XSBtRIWD0
Methodology document & a lot more info: https://mcatho.me/painting
Credits: https://mcatho.me/paintingcredits


Prepared world downloads:
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For Alpha 1.1.2_01 - http://www.mediafire.com/file/izrp7zw5c1bgy3m/World1.zip/file
For release 1.16.3 - http://www.mediafire.com/file/onnug4v6igje4ky/Skull_on_Fire_-_Painting_seed_world.zip/file

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Here's all the parameters to replicate the screenshot image yourself:
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Version: Alpha 1.1.2_01 [JAVA]
Seed: -1044887956651363087 or -6984854390176336655
Player X: -249.65~
Player Y:  91 (92.62 eye position)
Player Z: -29.04~
(This is the position of the player in alpha, not the camera itself. The camera is moved -0.1 backwards, i.e. opposite to the look direction, so if you're using anything else than alpha/beta MC, you have to compensate for that yourself.)
Camera yaw: -168.6 (horizontal rotation angle)
Camera pitch: 2.4 (vertical rotation angle)
FOV: 70 (Normal) (that's all that was possible in Alpha)
In-game time: 13249 ticks (to match the moon)
Cloud time: 24581 ticks
To match both the moon and clouds, either stand around or set your time to 12668 ticks, then restart the game, and stand around for another 24581 ticks for everything to align.
Window resolution: 1920x1148
Crop position: 138;48 (top-left corner, screen starts at 0;0)
Crop size: 1602x971
Converted to JPEG using these quantization tables: http://fotoforensics.com/analysis.php?id=cf7716e80530f991ccf01f89c546f74fe1ae1b59.101733&show=estq

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Here's a tutorial on how to load this seed in the Alpha version:
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1) You need to use the correct Minecraft Java version Alpha 1.1.2_01 (or older) otherwise it won't work. Don't forget to enable historical versions in the launcher, otherwise it will not show up. If it starts with "release", IT'S NOT THE CORRECT VERSION! It must be alpha.
2) This version doesn't support manually entering seeds. To be able to use this seed, a work-around is needed:
 - Load the correct Minecraft version and create a new world (for example, choose "World1"). After it loads, save and close the game.
 - Go into your Minecraft saves folder and open the folder of the world you created (for example "World1").
 - Make sure you're in the correct folder (you should be seeing folders with random numbers and letters).
 - Delete everything inside this folder except "level.dat". Only this one file should stay there.
 - Download NBTExplorer: https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-tools/1262665-nbtexplorer-nbt-editor-for-windows-and-mac
 - Use NBTExplorer to open the "level.dat" file and change the "RandomSeed" value to one of the painting seeds.
 - It's also a good idea to modify the player position while you're here. Expand the "Player" section and modify the position (and rotation too if you want) values to the ones described above. (You can also set the time to night here.)
 - After you've done that, click the save button and close the program.
3) Now open Minecraft again and load this world. You should now be standing looking at the valley in the painting, congratulations!

Warning - this version likes to crash quite often. Launching Minecraft with these Java arguments should hopefully fix most of that:
-Djava.util.Arrays.useLegacyMergeSort=true
-Xss515m

MODERN VERSIONS:
If you want to load this world in a modern version afterwards, then after you've generated as many chunks in Alpha as you want, load it in Beta 1.7.3 so it's converted to a newer format, and then you can load it in any newer version you want.