New spawner placement tool

• right click on entity sets the tool to that entity
• right click on entity that has passengers (horse, vehicle, ...) sets the tool to both the entity and its passenger
• places advanced spawner on the ground
• allows opening more advanced gui and setting options of advanced spawner, but by default sets the placed spawner to spawn one entity and disappear

New loot chest placement tool

• allows selecting loot table and number of times the loot table will be used on a chest
• places chest with these settings
  New/modified template rule for loot chests
• properly wrap these new loot chests and save them into structure templates
• if structure is built in survival using structure builder block the loot chest stays empty to prevent generating loot in survival

New structure scanner block

• allows placement of item scanner into it
• in addition to slot for the scanner item it opens scanner gui
• has very simple way of saving structure being scanned for repeated saving after a structure is modified in the world

Sounds very good to me

closing, all of this was implemented.

So this is for custom world creation? Is there a way to edit the default world gen for loot?