Yes, and it comes back out intact. Blender colours vertices; a slicer paints per triangle and subdivides a triangle to cut a clean edge, so the viewport shows you a per-vertex approximation of the painting - and that approximation is exactly what makes the one-click presets and the relief possible. The file's own painting is kept alongside the mesh and written back untouched when you export a Painted 3MF without repainting. Measured on a real Bambu Studio project: 916,350 triangles, 2,988 distinct painted states, not one changed on the way out. Colour groups and base materials come across too, and when the project declares its spools the real filament colours come with them. That project imports in about 25 seconds.

Colour 3MF for the everyday case: the slicer creates a filament slot per colour it finds. Painted 3MF when you want the model to open already painted, ready to slice. OBJ + MTL when the model needs more than four filaments, because there the slicers read the colours from the vertices and their colour dialog opens fully populated. STL when you are printing in a single colour.

A project 3MF opens with the spools your slicer already has loaded, so it shows you its palette rather than the file's. Colour 3MF and OBJ + MTL are the two routes that make the slicer create or match slots from the file itself. Whichever you use, check the filament mapping before a long print.

Press Check Mesh, then Quick Fix. Both sit in the export panel, right above the export buttons. Check Mesh counts what a slicer refuses — holes, zero-area faces, edges shared by three faces — and changes nothing. Quick Fix welds coincident vertices, drops zero-area faces and loose geometry, closes small holes and turns the normals outwards; it is kept only where it measurably helps, so a mesh that is already clean is left alone, and it cannot dissolve your model. Blender's own Suzanne is the usual culprit: she is not a solid to begin with, and a Subdivision Surface at level 3 turns her 42 open edges into 336. This is a quick tidy before export, not a repair suite — for diagnosis, voxel rebuild, self-intersections and separating parts, that is RegoSplit's job.

No UVs, no textures, no unwrapping. The presets read the geometry itself, and your own image is wrapped triplanar in millimetres. And yes, you can still paint by hand: the add-on writes an ordinary Blender colour attribute, so vertex paint works on top of it and the export picks that up.

Blender 4.2 LTS and newer, on Windows, macOS and Linux; the automated tests run on 4.2, 4.5 LTS and 5.2. The formats are read and written to spec and checked against files produced by Bambu Studio, Orca, Creality Print and PrusaSlicer. I have not print-tested every one of those slicers myself yet. The day I do, I will say so here.

Every preset has a filament-slot count and a spread control, and the relief has its own millimetre value: turn them down and the effect calms, turn them up and it bites. Nothing is destructive. Reset Shape puts the surface back and Clear Paint restores the colours the file arrived with, not a flat grey. If a preset misreads your model, write to me here with the file and I will look at it.

Yes: print, sell and distribute what you make with it. The add-on itself is GPL-3.0-or-later. Updates and support are included for good, with no support period and no renewal fee. Buy once and every future version is yours.

The add-on contains no artificial intelligence and no machine learning, and it has no network code at all: no telemetry, no analytics, nothing leaves your machine. It works fully offline. On the development side I use AI tools the way I use every other tool in my kit, for coding assistance and for translating my documentation into English, which is not my first language. I have been writing code since long before generative tools were mainstream. I read every line that ships and I take responsibility for how it behaves, and the numbers are there to back that up: 89 automated checks run headless on Blender 4.2, 4.5 LTS and 5.2, and a separate acceptance run installs the released zip into a clean Blender, drives the whole flow on real slicer projects and reopens every export to confirm each part is closed, manifold and has real volume.

It means this is the first public release and I am asking for your files. Everything on this page works today and is covered by automated tests - 89 headless checks on Blender 4.2, 4.5 LTS and 5.2, plus an acceptance run that installs this exact zip into a clean Blender, drives the whole five-step flow on real slicer projects and then reopens every export to confirm each part is closed, manifold and has real volume. What no test suite has is the variety of files real people own. So the beta is discounted, and the deal is simple: you get it cheap, and if something opens wrong you tell me here on Superhive and send me the file. Fixes go into the next update, and every future version is included - buy once, updated for good. Nothing about the add-on is time-limited or crippled: beta is about how much road it has under it, not about missing features.