LabCraft builds seven vessel types at their standard dimensions: Griffin and Berzelius beakers, Erlenmeyer flask, graduated cylinder, test tube, Petri dish, and round-bottom flask. Add LabCraft on any mesh object builds one of them whole: geometry, glass and liquid at the correct IOR, a graduation scale baked for the volume you picked, and a fill you type in millilitres instead of eyeballing. What comes back is a Geometry Nodes modifier and a material stack, both open, and you can take either apart. LabCraft is GPL-2.0-or-later, the same license as Blender itself, and it runs offline with no DRM.

LabCraft is built for product shots, science explainers, and scientific illustration, where a vessel's dimensions have to be defensible. Beakers use catalog dimensions per ISO 3819, graduated cylinders ISO 4788, and Erlenmeyer flasks DIN ISO 1773. Test tubes, Petri dishes, and round-bottom flasks use the conventional catalog sizes for their type. The catalog spans 5 mL (test tube) to 5 L (Griffin beaker), and a 250 mL Griffin measures what a real one does.

The presets cover water, ethanol, olive oil, blood, copper sulfate, and potassium permanganate. Each one carries its own refractive index (water 1.333, ethanol 1.361, olive oil 1.467, blood 1.378) and a Beer-Lambert absorption coefficient computed from published spectra rather than a picked tint, each at a stated strength: CuSO₄ at 0.25 M, KMnO₄ at about 0.2 mM, whole oxygenated blood at 45 % hematocrit, extra-virgin olive oil, and pure water and ethanol. Color therefore follows path length the way it does in reality: a 5 mL tube of KMnO₄ reads lighter than a 5 L beaker of the same solution. Blood is a dense scattering medium rather than a filter, so it renders through subsurface scattering and comes out deep and dark instead of pink. Refraction goes through the nested-dielectric IOR ratio, which is what keeps the liquid-glass interface clean in Cycles.

The glass comes as clear borosilicate at n = 1.474, as amber for light-sensitive reagents, and as frosted. All three take the painted labels, and all three carry a micro-imperfection layer you dial with one Glass Cleanliness slider, because spotless glass is what reads as CG.

One slider takes the glass from a fine misting low down to large drops and the occasional run at the top, and the misting stops at that vessel's own liquid line. Droplets come in a spread of sizes and refract like the little lenses they are. Separate controls set droplet size, beading, runs, 3D droplets, and how milky the film between them is. It works on all seven vessel types, the round flask's bulb and the test tube's rounded foot included.

The graduation marks and the mL numbers are baked onto a per-instance PNG decal and re-baked whenever the volume changes. There is a free text slot for "HCl 5%" or "Sample A" or a brand name, six label fonts (three built-in bitmap weights plus Liberation Sans, Serif, and Mono), and a switch between mL and fl oz. If the scale itself matters to your shot, you can move the ticks to the left rail that real graduated glassware uses, set major and minor tick length and thickness separately, change the text size, show or hide the size-and-field block, and give the paint a raised relief.

The two beakers, the graduated cylinder, and the Erlenmeyer flask carry a Fill (mL) field. Type 175 and the liquid stands at 175 mL, worked out from that vessel's own inner geometry: analytic cylinder volume for the straight bores, frustum plus neck for the cone. The printed graduation scale is baked from the same model, so the surface lands on the mark that names it rather than near it.

The test tube, the Petri dish, and the round-bottom flask keep a plain 0 to 1 slider and carry no printed scale, which is how they come in reality. The Erlenmeyer's scale is the coarse, approximate kind a real cone flask is stamped with, with the marks at their true nonlinear heights.

Underneath sits Fill Level, a plain 0 to 1 slider, so pouring and filling animate with two keyframes, no drivers and no constraints. The pouring spout is parametric (angle, pull-out, pull-down, arc width, start position), with per-vessel defaults: the two beakers and the graduated cylinder pour, and the rest ship without a spout, the way they come in real life.

Setup Studio Scene puts three-point area lights, emissive softbox cards, a curved sweep backdrop that carries the contact shadow, and a framed hero camera around your vessel, so your first render is a lit shot instead of a starting point. Four environments switch the look from one button each: Clean, Warm, and Dramatic Side-Lit on bundled CC0 HDRIs, plus a file-free procedural gradient. With the rig standing, an environment button re-lights the whole set rather than only the reflections; without the rig, it swaps the environment alone. The camera ships focused on the vessel at f/16, deep enough to hold it sharp front to back while the backdrop falls soft, and the f-stop and a depth-of-field toggle sit in the panel.

A second button applies the render settings Cycles needs for glass: deep transmission bounces, refractive caustics, sampling, and denoise. It asks first, and it leaves your own camera's resolution and framing alone.

The node group carries a schema version and migrates itself when you open an older file. Duplicating with Shift+D detaches the shared data rather than linking it. If a modifier ever ends up in a broken state, one operator resets it.

• One stopper shape in four finishes, sized to the beaker's mouth: cork, black rubber, glass, and a white cap. The four differ in material, not in geometry.
• Lathed quad topology, with a rolled rim, base flare, holding loops at every hard corner, and smooth-by-angle shading.
• Asset Browser support: one click marks the vessel as an asset, with variant and volume in the metadata and a thumbnail rendered for you.

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No account, no telemetry, no activation, and no DRM. It works on a machine that has never seen the internet. The one thing that does go online is Blender's own extension updater, and only if you choose to add the remote repository.

Cycles is the engine LabCraft is built for. The IOR, the nested-dielectric liquid, and the caustics all behave there, and photoreal stills are what it is tuned for.

The mesh is render-grade: lathed quads at a density chosen for close-up stills. It is not decimated for a game engine and not solidified for 3D printing.

LabCraft is kept working on the current Blender LTS release and the current stable release: 5.2 LTS today, the version the test suite runs on. Older Blender versions are not supported.

Every 1.x release is included in the purchase: bug fixes, compatibility with new Blender versions, and new functionality that fits within version 1. Updates arrive inside Blender once Superhive is added as a remote repository. The price rises for new buyers as substantial functionality is added, and a future major version of substantially larger scope may be offered as a separate product, with a discount for owners of version 1.

Source license: LabCraft is distributed under GPL-2.0-or-later, the same license as Blender itself. Blender's license terms require a GPL-compatible license for any add-on that imports its bpy Python API. If you redistribute the source code, your distribution has to be GPL-licensed as well.

Output license: the geometry, materials, and renders you create with the add-on are yours. The GPL does not reach your renders, your scene files, or your final imagery. Use LabCraft output in commercial film, games, products, teaching material, scientific publications, or anything else, without attribution, royalties, or further licensing.

What this means in practice:

• You may modify the source to suit your pipeline.
• If you redistribute the source, modified or not, your distribution stays GPL and keeps the copyright and license notices intact.
• You may not relicense the code as closed-source or pass it off as your own original work.

LabCraft's code is GPL-2.0-or-later. Two kinds of bundled asset carry their own, more permissive licenses:

• Studio HDRIs (labcraft/assets/hdri/): three environment maps from Poly Haven by Sergej Majboroda, released under CC0 1.0, so public domain and no attribution required.
• Label fonts (labcraft/assets/fonts/): the Liberation family (Sans, Serif, Mono) under the SIL Open Font License 1.1, with the OFL text shipping next to the fonts. The bitmap label weights are original to LabCraft.

LabCraft bundles no third-party code: it is pure Python on Blender's bpy API, so there are no further licenses to track.