Entity Documentation - minecraft:trail

Causes an entity to leave a trail of blocks as it moves about the world.

Trail Properties

Name	Default Value	Type	Description	Example Values
block_type	air	String	The type of block you wish to be spawned by the entity as it move about the world. Solid blocks may not be spawned at an offset of (0,0,0).	Snow Golem: "minecraft:snow_layer"
spawn_filter	not set	Minecraft filter	One or more conditions that must be met in order to cause the chosen block type to spawn.	Snow Golem: {"test":"is_temperature_value","operator":"<","value":0.81}
spawn_offset	[0, 0, 0]	x, y, z coordinate array	The distance from the entities current position to spawn the block. Capped at up to 16 blocks away. The X value is left/right(-/+), the Z value is backward/forward(-/+), the Y value is below/above(-/+).

Samples

Snow Golem

"minecraft:trail": {
  "block_type": "minecraft:snow_layer",
  "spawn_filter": {
    "test": "is_temperature_value",
    "operator": "<",
    "value": 0.81
  }
}