Setup Packets

Packets in the com.hypixel.hytale.protocol.packets.setup package (IDs 20-34).

WorldSettings (20)

Bound: Clientbound | Compressed: Yes

Configures the game world constraints and required assets.

Field	Type	Notes
nullBits	Byte	Bitmask.
worldHeight	Int	Vertical map height.
requiredAssets	List<Asset>	Optional (Mask 0x1). List of assets client must have.

WorldLoadProgress (21)

Bound: Clientbound

Updates the loading bar on the client.

Field	Type	Notes
progress	Float	0.0 to 1.0.
message	String	Loading status text (e.g., "Loading Chunks").

WorldLoadFinished (22)

Bound: Clientbound

Payload is empty. Tells the client to hide the loading screen.

RequestAssets (23)

Bound: Serverbound | Compressed: Yes

Client asking for asset data it is missing.

Field	Type	Notes
assets	List<String>	List of Asset hashes/names requested.

AssetInitialize (24)

Bound: Clientbound

Header for an incoming asset file transfer.

Field	Type	Notes
name	String	Asset name.
size	Int	Total size in bytes.
checksum	Int	CRC/Hash of the file.

AssetPart (25)

Bound: Clientbound | Compressed: Yes

A chunk of binary data for the file currently being transferred.

Field	Type	Notes
data	Byte[]	The binary payload.

AssetFinalize (26)

Bound: Clientbound

Payload is empty. Marks the end of the current asset transfer.

RemoveAssets (27)

Bound: Clientbound

Instructs the client to remove specific assets from its cache.

Field	Type	Notes
assetNames	List<String>	The list of asset names to delete.

RequestCommonAssetsRebuild (28)

Bound: Serverbound

Debug Packet. Requests the server to rebuild common assets.

SetUpdateRate (29)

Bound: Clientbound

Sets the client's logic tick rate.

Field	Type	Notes
rate	Int	Ticks per second (usually 20).

SetTimeDilation (30)

Bound: Clientbound

Controls the speed of the game simulation (slow motion or speed up).

Field	Type	Notes
dilation	Double	1.0 is normal speed.

UpdateFeatures (31)

Bound: Clientbound

Enables or disables client-side features (UI elements, controls).

Field	Type	Notes
features	Map<String, Boolean>	Map of feature IDs to enabled state.

ViewRadius (32)

Bound: Serverbound

Sent by the client when the user changes their render distance settings.

Field	Type	Notes
radius	Int	The new view radius in chunks.

PlayerOptions (33)

Bound: Serverbound

Syncs client settings to the server.

Field	Type	Notes
viewDistance	Int	Render distance.
skin	String	Player skin texture ID.
leftHanded	Boolean	Main hand preference.

ServerTags (34)

Bound: Clientbound | Compressed: Yes

Synchronizes registry tags (groups of items/blocks).

Field	Type	Notes
tags	Map<String, List<String>>	Map of Tag Names (e.g. #logs) to entry lists.