This project embeds a WebAssembly runtime into Minecraft, and also renders a framebuffer into the world as blocks. I wrote a couple Python scripts to find the average colour of each block texture in the game, and then map block names to a list of colours in a palette. The guest program can swap the palettes and write to the framebuffer however it pleases, which is enough to run DOOM’s main menu. Had I figured out a good way to implement user input, the game would have been fully playable within Minecraft. It uses a datapack containing the palettes and program. Additionally, I had to write a script to dump DOOM’s palette data so I could use it in the mod.

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