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PrefabOptimizer

Remove all the blocks that can't be seen by players in your selection or selected prefabs. This mod help you to reduce your prefab size and prefabs spawn time by removing a lot of useless blocks.
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File Details
DownloadInstall

PrefabOptimizer-1.0.0.jar

ByTheobosse
  • R
  • Apr 15, 2026
  • 60.50 KB
  • 53
  • Early Access

File Name

PrefabOptimizer-1.0.0.jar

Supported Versions

  • Early Access

Changelog

All notable changes to PrefabOptimizer will be documented in this file.

This project currently follows the version from manifest.json and pom.xml.

[1.0.0] - 2026-04-15

Initial release of PrefabOptimizer.

Included

  • Selection optimizer GUI for BuilderTools selections.
  • Prefab batch optimizer GUI for optimizing prefab files and folders.
  • Main /prefaboptimizer command with /popt and /prefabopt aliases.
  • /prefaboptimizer selection subcommand with /prefaboptimizer sel alias.
  • /prefaboptimizer prefabs subcommand with /prefaboptimizer prefab and /prefaboptimizer batch aliases.
  • BuilderTools-compatible selection optimization with /undo support.
  • In-game prefab browser for selecting prefab sources.
  • Individual prefab source selection.
  • Folder source selection.
  • Optional recursive folder search.
  • Target writable asset-only mod selection.
  • Target folder selection inside Server/Prefabs.
  • Conservative hidden full-cube optimization mode.
  • Transparent and non-opaque block preservation.
  • Strict cube-only mode.
  • Optional CubeWithModel consideration when strict cube-only mode is disabled.
  • Custom block exclusions by regex.
  • Custom block exclusions by comma-separated, semicolon-separated, or newline-separated tokens.
  • Background prefab batch processing.
  • Player-facing status and warning messages.
  • Automatic GUI close when a valid optimization starts.
  • Completion messages with removed block counts and optimization percentage.
  • Preservation of prefab entities, fluids, tints, and block component holders.
  • Preservation of relative folder structure for folder batch sources.
  • Compatibility shims for current BuilderTools selection and block mask APIs.

Technical Notes

  • Targets Hytale server 2026.03.26-89796e57b.
  • Compiles with Java 25.
  • Uses Hytale's provided com.hypixel.hytale:Server dependency.
  • Batch optimization writes optimized prefab copies through PrefabStore.savePrefabToPack(...).
  • Selection optimization runs through BuilderTools history using a custom OccludedBlockMask.

Known Limitations

  • Only the conservative hidden full-cube optimization mode exists in this release.
  • Batch prefab optimization writes prefab files and is not integrated with /undo.
  • Aggressive optimization modes are not implemented yet.
  • A dedicated block picker for exclusions is not implemented yet.
  • Progress reporting is status/message based rather than a detailed progress bar.
  • There are no automated tests yet.