uNmINeD

Hytale support is coming soon!

Hytale is a sandbox RPG game developed by Hypixel Studios, released in early access on 13 January 2026.

Hytale worlds are built from blocks, just like Minecraft, so uNmINeD can display them after some minor development and configuration.

This is what a Hytale world looks like in uNmINeD:

I couldn’t find any information about the new biome storage format introduced in Bedrock 1.18, so I did some reverse engineering, and share the results to help others.

Bedrock 1.18 assigns a biome for each block, unlike Java, which assigns one to a 4x4x4 cube. Biome data for a whole chunk is stored in one LevelDB entry with the chunk key type 43 (0x2b), containing biome information for each subchunk.

Entry format:

• 512 bytes: seems to be a heightmap
• Paletted biome data for each subchunk from bottom to top
  • 1 byte header
    • bit 0: always 1 (?)
    • bits 7..1: bits per value for the following array (can be 0 if the palette contains only one biome)
    • 0xff indicates non-existent subchunk, in this case the following array and palette data are omitted
  • n bytes: biome data for each block in the 16x16x16 subchunk in XZY order using the same aligned bit-packed int32 array format used for paletted block data. This array is omitted if the palette contains only one biome.
  • 1 byte: biome palette length
  • n * int32: biome palette entries (numeric biome IDs)