The kernel
Exact geometry
A proprietary B-rep kernel built on Open CASCADE Technology, running in its own processes. Booleans, fillets and STEP behave like a desktop modeler, because they are one.
The studio
One modeler.
The whole job.
Kozorosa covers the work from the first sketch to the file the machine reads — and every step of it is an action an agent or a script can call as well as you.
How it fits together
A kernel, a timeline, a catalogue.
Three ideas carry everything else. They are why a quick SketchUp-style push and a constrained sketch can live in the same model — and why an agent can do real work in it.
The timeline
History you can edit
Features and annotations in one order, with a marker you roll back. Reorder, suppress, group, branch and merge — 101 undo states, each a small patch.
The catalogue
One action, many callers
240+ actions with JSON schemas, called the same way by the interface, the REST API, MCP, Python and the assistant. Nothing is UI-only.
The surfaces
Pick up where you are.
Modeling
Direct tools with inference, constrained sketches, solid features, patterns, direct face edits and persistent names.
Modeling
Assemblies & motion
Components and instances, seven joint types, gears, belts, cams, motors and motion studies.
Assemblies & motion
Drawings
ISO and ANSI sheets, projected, section and detail views, dimensions that follow their edges.
Drawings
Simulation
Linear static stress and modal analysis, meshed from the exact B-rep and checked against closed-form answers.
Simulation
CAM
Setups, a tool library, 2.5D and 3D strategies, Z-map simulation, posts for GRBL, LinuxCNC and Fanuc.
CAM
Materials & rendering
PBR materials and textures at real scale, scenes, styles, section planes and AI concept renders.
Materials & renderingFiles
Your geometry leaves whenever you want it to.
Exact formats with names, colours and components; mesh formats for printing and the web; and Kozorosa's own documents, which keep the whole editable history.
- In: STEP, IGES, BREP, STL, OBJ, 3MF, glTF, GLB, Collada and IFC — plus DXF and SVG into sketches.
- Out: STEP, IGES, BREP, STL, OBJ, 3MF, glTF, GLB, Collada, IFC, DXF, SVG — and drawings as PDF, SVG and DXF.
- .k3d is the editable Kozorosa document; .k4d adds the computed scene, signed, so it opens at once and previews on import.
- Modules add theirs: BTLx, DSTV NC1, Howick CSV, IFC4 and cutting lists.
Honest limits
What it does not do — yet.
We would rather you knew now than after a week of trying. Surface modeling beyond loft, sweep and thicken. Non-linear, thermal and fluid simulation. Five-axis CAM. Sheet-metal unfolding. SketchUp's .skp, which has no open format — Collada is the way in and out.
The full inventoryTry it on a part you already have.
Import a STEP file, push a face, put a dimension on it. 5 days, every tool, nothing to pay until you decide.