Litematica Preview v0.3.0

Features

• Enable multithreaded preview generation by default with 4 worker threads when enough logical processors are available. Existing saved settings are preserved. Loading time reduced by about 50%.
• Add a conservative memory scheduling option for multithreaded previews. It is disabled by default; enabling it reduces concurrent mesh work and queued upload batches, which may slow decoding.
• Show the combined host and decoder private working sets during loading. This figure excludes WebView2 and GPU memory.

Improvements

• Start uploading complete geometry batches while later chunks are still being generated. Keep mesh work, host batches, and upload preparation bounded, and discard staged results on cancellation or failure.
• Pack preview data into shared arenas for fewer IPC reads and GPU buffer allocations without changing draw order.
• Keep the optional decoder process-memory limit effective with either scheduling mode.

ToDos

• Add recent-files history.
• Add lighting shader.

How to install

There are two options for you to install, pick the one you prefer:

• A one-click installer (LitematicaPreview-<version>-win-x64-setup.exe): Installs per-user without requiring administrator privileges.
• A portable .zip package (LitematicaPreview-<version>-win-x64-portable.zip): Download and extract the portable archive and run LitematicaPreview.exe.

Full Changelog: v0.2.0...v0.3.0

Litematica Preview v0.2.0

Features

• Add preview settings for chunk separation and an optional decoder memory limit. The limit is off by default; when enabled, it starts at 2048 MB and accepts values up to 8192 MB.
• Show separate loading progress for decoding, mesh generation, and model upload.
• Display decoder memory while loading and uploaded model-data size in the footer.

Improvements

• Replace the chunk-size selector with a five-stop slider: 16, 32, 64, 128, and 256 blocks per side.
• Reduce peak decoding memory for .litematic previews with fixed-buffer, two-pass streaming and compact block indexing. Peak memory usage dropped by 90%.
• Avoid retaining the full decompressed .litematic document and packed block-state arrays during preview decoding.

ToDos

• Add recent-files history.
• Add lighting shader.
• Continue improving memory use for formats that retain dense decoding paths.

How to install

There are two options for you to install, pick the one you prefer:

• A one-click installer (LitematicaPreview-<version>-win-x64-setup.exe): Installs per-user without requiring administrator privileges.
• A portable .zip package (LitematicaPreview-<version>-win-x64-portable.zip): Download and extract the portable archive and run LitematicaPreview.exe.

Full Changelog: v0.1.0...v0.2.0

Litematica Preview v0.1.0

Initial release of Litematica Preview — an offline Minecraft schematic and structure viewer for Windows x64.

Highlights

• Supports .litematic, .schem, .schematic, .nbt, .snbt, .mcstructure, and .nusn formats
• Fast offline rendering powered by WebGL 2 and Nucleation
• Distributed as both an installer (.exe) and a portable zip package

ToDos

• Decrease memory usage when decoding schematic and structure
• Make memory limit a changeable option
• Support "history files" feature
• Add lightning shader

How to install

There are two options for you to install, pick the one you prefer:

• A one-click installer (LitematicaPreview-<version>-win-x64-setup.exe): Installs per-user without requiring administrator privileges.
• A portable .zip package (LitematicaPreview-<version>-win-x64-portable.zip): Download and extract the portable archive and run LitematicaPreview.exe.

Full Changelog: https://github.com/Arcadi4/LitematicaPreview/commits/v0.1.0