MiniSlicer for Blender

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Blender add-on that slices the active object and exports native .phz / .ctb files ready to print on Phrozen resin printers, without leaving Blender and with no intermediate software.

Free and open source. If MiniSlicer is useful to you, you can support its development with a donation on Ko-fi: ko-fi.com/micotico36213 ☕

Supported printers

Model	Resolution	Plate (mm)	Format	Status
Sonic Mini	1080×1920	67.8×120×130	.phz	✅ Verified on hardware
Sonic	1080×1920	67.8×120×170	.phz	🧪 Beta
Transform	3840×2160	291.8×164.2×400	.phz	🧪 Beta
Sonic Mini 4K	3840×2160	134.4×75.6×130	.ctb	🧪 Beta
Sonic Mini 8K	7500×3240	165×71.3×180	.ctb	🧪 Beta
Sonic 4K	3840×2160	134.4×75.6×200	.ctb	🧪 Beta
Sonic XL 4K	3840×2400	192×120×200	.ctb	🧪 Beta
Sonic Mighty 4K	3840×2400	200×125×220	.ctb	🧪 Beta
Sonic Mighty 8K	7680×4320	218×123×235	.ctb	🧪 Beta
Sonic Mega 8K	7680×4320	330×185×400	.ctb	🧪 Beta
Sonic Mini 8K S	7536×3240	165.8×71.3×170	.prz	🚧 Coming soon
Sonic Mighty 12K	11520×5120	218.9×123.1×235	.prz	🚧 Coming soon
Sonic Mega 8K S	7680×4320	330×185×300	.prz	🚧 Coming soon

About the beta status: profiles come from the specifications published by Phrozen, and the generated files are validated against the reference implementations (pixel-by-pixel round-trip, UVtools, uv3dp), but for now only the Sonic Mini has been verified with real prints. If you print with another model, open an issue and tell us how it went — that is what moves a profile from beta to verified. The .prz models (2023+) appear in the panel but have no file writer yet.

Features

• Integrated panel: 3D viewport sidebar (N key), "MiniSlicer" tab, UI translated into 10 languages.
• 13 Phrozen profiles with the build volume drawn in the viewport; the part is auto-centered when slicing.
• Layer viewer: shows the exact image of each layer at the native LCD resolution of the selected profile, navigable layer by layer.
• Slices the active object directly: modifiers (Boolean, Remesh, supports…) are applied automatically; object scale and rotation are respected.
• Non-blocking export: modal operator with progress in the status bar (Esc cancels).
• Scanline fill with the even-odd rule: holes and internal cavities of watertight meshes come out right with zero setup.
• Resin (ml) and print-time estimates; warning when the part does not fit the plate; thumbnails for the printer screen.
• Zero dependencies, zero network: only uses the numpy bundled with Blender — no activation keys, no telemetry, no connection to anything.

Requirements

• Blender 4.2 or newer (tested on 5.1.2).
• A Phrozen resin printer from the table above.

Installation

1. Download MiniSlicer_Blender.zip (or build it, see below).
2. In Blender: Edit → Preferences → Add-ons → ▼ → Install from Disk… and pick the zip.
3. Make sure the add-on checkbox is enabled.
4. In the 3D viewport press N → MiniSlicer tab.

Usage

1. Pick your printer in the panel dropdown.
2. Select your part (watertight mesh, with supports already modeled).
3. Load / Refresh Model — check size in mm, layer count and time.
4. Open Layer Viewer — inspect the sections before exporting.
5. Adjust exposure for your resin (typical: 1.5–3 s per 0.05 mm layer; bottom 30–40 s).
6. Export (.phz or .ctb depending on the profile) → copy the file to the USB drive → print.

Units: by default it uses the scene units (1 m = 1000 mm). If you model with the "1 unit = 1 mm" convention, change it in the panel selector.

Building the zip from source

blender --command extension build --source-dir minislicer_blender --output-filepath MiniSlicer_Blender.zip

File format details

The .phz and .ctb (ChiTu) formats are implemented after the reference implementation in UVtools and the catibo documentation:

• Binary header and per-layer table according to each spec.
• Layer image: 7-bit grayscale RLE (.phz) / .ctb RLE; XOR encryption supported (files are written unencrypted, EncryptionKey=0).
• RGB15 + RLE previews (400×300 and 200×125).

Generated files were validated round-trip (pixel-by-pixel re-read) and with uv3dp as an independent reader.

First print

Print a 20 mm calibration cube first: if it measures 20.0 mm per side and the orientation is correct (nothing mirrored), the profile is fine. If something comes out inverted, untick "Mirror Image in X".

License

GPL-3.0-or-later — like every Blender add-on. Free, with no activation keys and no registration.

This software comes with no warranty; always verify your first print with a small part.