Unreason3D
Unreason3D
A NURBS-based unproduct modeler
Curves, surfaces, solids, SuperB limit surfaces, subdivision, history, auto node graph, rendering — one workspace, in a browser tab. No cost, no install, no accounts.
What it is
Not exactly a parametric solid modeler, and not a surface modeler or a mesh SubD modeler either. Pieces of each, bashed and flowing together into one workshop.
Unreason-able things
Things mature modelers also do
- NURBS curves and surfaces. Degree, knots, continuity.
- Subdivision limit surfaces that resolve back to NURBS, with creases.
- Loft, sweep, extrude, pipe, revolve…
- Trims and splits on real trimmed surfaces.
- Solid booleans, though still in progress.
- Parametric history, and undo that follows it.
- Rhino .3dm and .obj in and out. partial, for now
- .unreason writes the whole document and reads it back.
Things others typically don't
- Implicit and explicit history at once — the model and the nodes that control it are two live views of one graph.
- Linked copy-paste by default. Edit the source and the copies follow, until you bake one loose.
- Polytools. One Primitive is a sphere or a cube or a torus, as NURBS or as SuperBs.
- Move, rotate or scale anything at any moment, with deformers that stay live.
- SubD and NURBS as equals in one kernel.
Things it doesn't have
- A plugin system. It is open source — write the tool into your copy.
- A node system as open-ended as Grasshopper. Fewer nodes, each more powerful.
- Real-time collaboration, accounts, cloud anything.
- Native desktop builds, though you could roll your own.
This is not production software
A research project and a teaching tool, made by one quirky person and his rational LLM. Do not use it for important, safety-critical or government regulated work, or for anything you cannot afford to lose. It has bugs we know about, and probably many more we don't.