Free and open source, for MSLA and SLA printers. Supports, hollowing and a layer-by-layer check that catches a failed print before it costs you resin — all of it on your own computer, with no account and no cloud.
Download · Try it in a browser · Website · Guides · Printers · What's new · Discussions · Report a bug
Encrust is in alpha, and it is moving fast. The whole pipeline works today — import, orient, hollow, support, slice, analyse, write and send to the printer — and it has printed real parts. It is also young, so keep a slicer you trust installed alongside it while it grows up. Here is exactly where it stands.
- A sliced file your printer accepts — 100 printer profiles, 20-odd container formats, written and read back by the same code.
- Supports that hold — automatic branching trunks, manual placement, painted patches, rafts.
- Hollowing that drains — infill, drain holes, and a warning when resin would be trapped.
- A layer-by-layer check before you print — islands, suction cups and thin cross-sections found in what the file really cures, not in the model.
- A command line for the same pipeline — slice a folder of models without opening a window.
In a browser, with nothing to install: open encrust.app/app. It is the same Rust core compiled to WebAssembly and drawn with WebGPU; your model is opened and sliced on your machine and nothing is uploaded. It needs a browser with WebGPU — a recent Chrome or Edge is the safe bet — and it keeps working offline after the first visit. This browser build is younger than the desktop one and still catching up to it; for a print you care about, use the desktop app.
On your desktop, from encrust.app/download or the latest release:
| System | Download |
|---|---|
| Windows 10/11, 64-bit | Encrust-windows-x86_64-setup.exe |
| macOS 12+, Apple silicon | Encrust-macos-aarch64.dmg |
| macOS 12+, Intel | Encrust-macos-x86_64.dmg |
| Linux, x86-64 | Encrust-linux-x86_64.AppImage or encrust_amd64.deb |
Install it like any other application. You'll need a GPU with Vulkan, Metal or DirectX 12 — anything from the last several years will do. Encrust looks for a new release once a day and updates itself from Settings › Updates, where that daily look is also turned off.
The builds aren't code-signed yet, so the first launch needs one extra step. On Windows, choose More info › Run anyway. On macOS, drag Encrust to Applications, then run
xattr -dr com.apple.quarantine /Applications/Encrust.appin Terminal.
- Pick your printer and your resin — the printer from the list, the resin as one you make, since Encrust ships none (an exposure is measured on the machine in your room).
- Load something small, orient it, add supports, hollow it if it is solid.
- Open the analysis view before you send it — islands and suction cups are cheaper to fix here than on the plate.
- Unless your printer is the one verified below, print a calibration piece first.
Step by step: encrust.app/guides.
Encrust ships with profiles for 100 printers from 14 makers — the full list, searchable, is at encrust.app/printers.
| Maker | Printers | Formats |
|---|---|---|
| Anycubic | 19 | .pwmx family, .photon |
| Elegoo | 16 | .goo, .ctb |
| Creality | 15 | .cxdlp, .ctb |
| Phrozen | 13 | .ctb, .zip, .goo |
| EPAX | 8 | .ctb |
| FlashForge | 8 | .svgx |
| Nova3D | 5 | .cws |
| Peopoly | 4 | .ctb |
| QIDI | 4 | .ctb |
| Wanhao | 3 | .zip |
| Prusa | 2 | .sl1, .sl1s |
| Kelant, UniFormation, Voxelab | 1 each | .zip, .ctb, .svgx |
Every other profile is built from the printer's published specification, and its files are
checked by reading them back — but nobody has cured resin with them yet. They are very
likely close, so start with a small calibration piece and check the build area and mirroring.
Encrypted .ctb, which some newer Chitu boards need, isn't supported yet.
Own one of these, or a printer that isn't listed? A single test print is the most valuable thing you can give this project — see Help it grow.
Slicing and exposure
- Contour slicing with closed-contour guarantees, adaptive layer height by curvature, and several cutting planes per layer
- Exposure by height, anti-aliasing with grey levels and blur
- Textures pressed into the surface as relief, using UVs from OBJ and 3MF
Supports
- Manual and automatic placement, branching trunks, rafts and bracing
- Supports that stay out of the model and actually hold what they're under
- Painted patches, per-part editing, and contact tuning
Hollowing and mesh tools
- Hollowing with infill, drain holes and trapped-resin detection
- Diagnosis and repair: welding, holes, non-manifold edges, degenerate faces, winding
- Cut and split, auto-orientation, auto-arrange, multi-plate layouts, batch preparation
Print analysis
- What the written file really cures, layer by layer, and where it is likely to fail
- Island, suction and cross-section reports, with the measurements that produced them
Files and printers
- Reads STL, OBJ and 3MF, with UVs and one texture per material
- Writes
.goo,.ctbv4/v5,.cbddlp,.photon,.pwmxand sixteen more Anycubic extensions,.sl1,.sl1s, the.zipof greyscale PNGs,.cxdlpv3/v4,.svgxand.cws— and reads every one of them back - Sends over your local network: SDCP v3 and v1 (Elegoo and Chitu boards), and PrusaLink
- Projects and printer, resin and support profiles are plain TOML files you can open and edit
The same pipeline without a window, for batches and scripts:
encrust slice model.stl --printer elegoo-saturn-4-ultra --resin my-grey --center -o model.gooEvery flag, with worked examples, is in docs/cli.md.
Building from source
With the toolchain rust-toolchain.toml pins:
git clone https://github.com/vvvlladimir/Encrust.git
cd Encrust
cargo run --release -p encrust-app --bin encrust-gui # the window
cargo run --release -p encrust-cli --bin encrust -- --helpCONTRIBUTING.md covers the full development setup, and
docs/design/web-build.md the browser build.
Alpha. Every stage of the pipeline is in place and covered by around 1,500 unit, property and integration tests, which run on Windows, macOS and Linux for every change.
Being honest about what alpha means here:
- One printer is proven. Of the hundred profiles, only the ELEGOO Saturn 4 Ultra has printed a file Encrust wrote. The rest are very likely close, but unconfirmed.
- Resin settings are a starting point. Exposure and lift values in the bundled profiles aren't calibrated for your bottle — run a calibration print first.
- The browser build trails the desktop one. It runs the same core, and it is newer.
- There will be bugs. Encrust hasn't yet had the thousands of hours of real-world use that shake out the last ones. Before a long print, it's worth comparing its output with a slicer you already trust.
The worst case is a failed print: a few hours and a few millilitres of resin. If that sounds like a fair trade for trying something new, you're exactly who this release is for — and every report you send makes the next one better.
Encrust is actively developed, and right now the people who try it shape it the most.
- Test your printer. Tell us which printer you have, attach a file its own software produced, and say whether Encrust's file printed. This is the one thing the project can't do on its own. Open an issue.
- Report what breaks. A bug report or a mesh that trips it up is genuinely useful.
- Say what you'd want. Ideas and questions are welcome in Discussions.
- Send code. Start with CONTRIBUTING.md and
AGENTS.md;docs/decisions/explains the reasoning behind every structural choice.
If Encrust looks useful to you, a ⭐ helps other resin printers find it.
AGPL-3.0-only. You're free to run, study, change and share Encrust; if you distribute a modified version, or offer it to others over a network, you share its source too.
Encrust prepares files for machines that cure resin with ultraviolet light. It can't know whether your settings suit your resin, printer or model, and a wrong exposure or lift value can ruin a print and, occasionally, damage hardware. Check what it produces before a long job, and follow your printer's and resin's own instructions. Provided without warranty of any kind, as the licence says.