A WIP converter that takes a PNG image and converts it to a Luanti schematic. (WARNING: Success converting images not guaranteed.)
Ubuntu/Debian:
sudo apt install g++ zlib1g-dev
Fedora:
sudo dnf install gcc-g++ kernel-devel zlib-devel
openSUSE:
sudo zypper install gcc-c++
Arch:
sudo pacman -S base-devel
Alpine:
sudo apk add build-base zlib-dev
Void:
sudo xbps-install zlib-devel
Windows/MacOS: good luck have fun (PRs welcome)
g++ -o png2mts -lz -O3 src/main.cpp
First you need a image to convert. (keep the size <500px in any axis unless your crazy or want even more detail) And second you need Minetest/Luanti and a way to load schematics (i recemmend Worldedit)
Run png2mts -i <your image path here> -o <your output path here> and move the resulting .mts file to your Luanti world's schematic directory (generally at ~/.minetest/worlds/<world name>/schems)
(example: png2mts -i ~/luanti.png -o ~/.minetest/worlds/world/schems/luanti.mts. do be warned that the default color palette is configured to use Minetest game. you can change palette with -p <palette path>)
Run Luanti, load the schematic, and profit!