Monsters don't spawn in proper light levels when changing them via a datapack.
How to reproduce:
Create a datapack and alter the "dimension_type" (for example: "overworld.json") to the following values:
...
"monster_spawn_block_light_limit": 15,
"monster_spawn_light_level": {
"type": "minecraft:uniform",
"max_inclusive": 15,
"min_inclusive": 10
},
...Load into the game and set up a lit area with light level 10+ under the sky.
Result: monsters don't spawn in that lit area
Note: the monsters will still spawn in light levels below 7 or lower if the area isn't under the sky.
Attachments
Comments 3
Datapack has been attached.
The only file in it is located in "data/minecraft/dimension_type/overworld.json":
{
"ambient_light": 0.0,
"bed_works": true,
"coordinate_scale": 1.0,
"effects": "minecraft:overworld",
"has_ceiling": false,
"has_raids": true,
"has_skylight": true,
"height": 384,
"infiniburn": "#minecraft:infiniburn_overworld",
"logical_height": 384,
"min_y": -64,
"monster_spawn_block_light_limit": 15,
"monster_spawn_light_level": {
"type": "minecraft:uniform",
"max_inclusive": 15,
"min_inclusive": 10
},
"natural": true,
"piglin_safe": false,
"respawn_anchor_works": false,
"ultrawarm": false
}
If you have created a data pack, please attach it to the report.