Level Chunk With Light

Play 0x2D, server → client.

play · 0x2D · clientbound (server → client)

Sends the block data, heightmaps, block entities, and light data for one chunk column at chunkX, chunkZ. The server sends it for every chunk in the player’s view distance, usually inside a chunk batch. The client loads or replaces the chunk and renders it.

Sent by the server, read by the client. Listen for it with client.on("LevelChunkWithLight", (data) => …) on the receiving side.

Fields

Field	Type	Notes
`chunkX`	Number
`chunkZ`	Number
`chunkData`	Byte[]
`blockEntities`	Struct[]	Optional. Shape: `Array<{ x: number; z: number; y: number; type: number; nbtData: unknown }>`.
`heightmaps`	Struct[]	Optional. Shape: `Array<{ type: number; data: Array<bigint \| number \| string> }>`.
`skyLightMask`	Long[]	Optional. Shape: `Array<bigint \| number \| string>`.
`blockLightMask`	Long[]	Optional. Shape: `Array<bigint \| number \| string>`.
`emptySkyLightMask`	Long[]	Optional. Shape: `Array<bigint \| number \| string>`.
`emptyBlockLightMask`	Long[]	Optional. Shape: `Array<bigint \| number \| string>`.
`skyLight`	Byte[][]	Optional.
`blockLight`	Byte[][]	Optional.

Send it

await client.sendPacket("LevelChunkWithLight", {
  chunkX: /* Number */,
  chunkZ: /* Number */,
  chunkData: /* Byte[] */,
  blockEntities: /* Struct[] */,
  heightmaps: /* Struct[] */,
  skyLightMask: /* Long[] */,
  blockLightMask: /* Long[] */,
  emptySkyLightMask: /* Long[] */,
  emptyBlockLightMask: /* Long[] */,
  skyLight: /* Byte[][] */,
  blockLight: /* Byte[][] */,
});

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: src/Core/Versions/776/Packets/play/clientbound/LevelChunkWithLight.ts