Sun Damage

Vampires take damage in sunlight. You can exempt whole biomes, dimension types or dimensions (levels) from that with a no_sun_damage.json file. The resolved settings are synced to the client (used e.g. for the screen tint).

JSON Schema

schemas/no_sun_damage.schema.json

Location

data/<namespace>/vampirism/no_sun_damage.json

This is read by a custom reload listener (not a data pack registry): every file whose path ends in vampirism/…/no_sun_damage.json is loaded and all packs stack – later packs add to earlier ones unless they set replace.

The same exemption sets are also fed by the server config (noSundamageBiomes, noSundamageDimensions, enforceSundamageDimensions) and by the addon API (ISundamageRegistry). Everything is merged together.

Fields

data/vampirism/vampirism/no_sun_damage.json

{
  "replace": false,
  "biomes": [
    "#vampirism:has_faction/vampire",
    "minecraft:deep_dark"
  ],
  "dimensions": [
    "minecraft:the_nether",
    "minecraft:the_end"
  ],
  "levels": {
    "no_damage": [ "mymod:shadow_realm" ],
    "damage": [ "minecraft:overworld" ]
  }
}

Field	Type	Description
replace	bool (default false)	If true, clears the biome / dimension / no_damage entries collected so far before applying this file. damage entries are not cleared.
biomes	(Resource location | #biome_tag)[]	Biomes with no vampire sun damage. Defaults to [].
dimensions	(Resource location | #dimension_type_tag)[]	Dimension type ids (e.g. minecraft:the_nether) with no sun damage. Defaults to [].
levels	object	Per-dimension overrides (see below). Optional.
levels.no_damage	Resource location[]	Dimension (level) ids with no sun damage. Ids only, no tags. Defaults to [].
levels.damage	Resource location[]	Dimension (level) ids that always have sun damage, overriding everything else. Defaults to [].

Resolution order

For the vampire's current position, sun damage is checked in this order:

1. If the current dimension is in levels.damage → sun damage applies (highest priority).
2. Else if the current dimension type is exempt (dimensions) → no sun damage.
3. Else if the current dimension is in levels.no_damage → no sun damage.
4. Else if the current biome is exempt (biomes) → no sun damage.
5. Otherwise → sun damage applies.

For a dimension that appears in neither no_damage nor damage, and whose type is not exempt, the sundamageInUnknownDimensions server config decides.