TUTORIAL: Making and Adding Custom Structures to Minecraft Using Ruined Portals

This tutorial aims to teach a simple way to add custom structures to Minecraft by the use of structure blocks and datapacks.

Your first step is to create the datapack folder, to do that look here [url=minecraft.gamepedia.com/Tutorials/Creating_a_data_pack

]minecraft.gamepedia.com/Tutorials/Creating_a_data_pack[/url]
To format the pack to generate the structures you will make inside the folder called data, create a new folder and call minecraft. Inside the minecraft folder, create a folder called structures, then create a folder called "ruined_portal". Inside the ruined_portal folder will go .nbt files which describe the structure. So it will look like this datapack name/data/minecraft/structure/ruined_portal

Now create a new flat world and type /give @s minecraft:structure_block. This will give you a structure block.

Place the structure block on the ground and click it. You will see a gui with a text box at the top and a button for cycling through the different modes. You should only be concerned with the text box. In the text box, copy and paste a string from below. Then press "load".

After that press load. You should see a ruined portal structure. Destroy all the blocks of the portal until you have a blank outlined shape. In this structure build whatever you want as long as it fits in the shape. You can include entities if you want. Chest loot does not draw from the ruined portal loot table but either stays empty or keeps whatever you place in it. However, you can use an NBT editor to edit the chest loot and make it draw from any chest loot table.

After you have built your structure, in the structure block go to save and choose "Include Entities" if you have entities in the build. Press the "save" button underneath the entities button.

To access you saved .nbt file, exit the world, go to world settings and open up your world folder. Inside the "generated" folder find you .nbt file. Copy and paste the file into you datapack under "ruined_portal".

To test that you made your datapack correctly, put your datapack into the datapacks folder of a new world and get a structure block. On the load screen type in the ruined portal string that you edited. Press load and you should see your structure. If not, make sure you did everything correctly and did the correct ruined portal type. To add more custom structures, just repeat the process with the other types of portal.