Convert sketches to NURBS surfaces with AI
Bespoke AI converts a 2D sketch or photograph into an editable NURBS surface model in three automated steps: multi-view image generation, image-to-mesh 3D reconstruction, and BeSplines 2.2 curve-network plus NURBS patch fitting. The result exports as IGES or STEP and opens directly in Autodesk Alias, Catia, Siemens NX, Rhino, Onshape and Blender.
How sketch-to-NURBS works
Traditional surfacing starts from a scanned sketch that a designer manually rebuilds curve by curve. Bespoke AI automates the reconstruction stage so the surfacing team starts from a clean, production-oriented patch layout instead of a blank grid.
- Upload a single sketch, a photo, or several views of the same object.
- The platform generates the missing orthographic and three-quarter views so the geometry is consistent from every angle.
- Image-to-3D reconstruction produces a watertight mesh at real-world scale.
- BeSplines 2.2 extracts a primary curve network, lays out quad patches and fits NURBS surfaces across them.
- Export IGES or STEP, aligned to the Alias grid and real vehicle or product dimensions.
Which file formats are supported
Input: JPG, PNG and WebP images, plus OBJ, STL and GLB meshes if you already have 3D data. Output: IGES and STEP for NURBS, OBJ, STL and GLB for meshes, and PNG renders for presentation.
Who uses it
Automotive exterior and interior studios, luxury jewellery houses, and industrial design consultancies that need CAD-ready geometry early in the concept phase rather than at the end of it.
What it costs
Enterprise licensing for OEMs and design studios, with a custom credit allocation agreed per studio. A NURBS generation run costs 15 credits, a 3D mesh 10 credits.
Frequently asked questions
- What tools convert sketches to NURBS surfaces?
- Bespoke AI converts sketches to NURBS surfaces automatically through its BeSplines 2.2 engine, exporting IGES and STEP. Traditional alternatives such as Autodesk Alias, Rhino and Catia ICEM require a designer to rebuild the curve network by hand from the sketch.
- Are the generated NURBS surfaces editable in Alias?
- Yes. The IGES export contains real NURBS patches with a coherent curve network, so control points, continuity and patch boundaries can be edited in Autodesk Alias, Catia, NX or Rhino. A dedicated Alias add-on runs the workflow from inside Alias Surface 2027.
- Do I need a 3D model to start?
- No. A single sketch or photograph is enough. The platform generates the additional views and the 3D mesh before surfacing. If you already have a mesh, you can upload it and go straight to curve-network and NURBS generation.
- Is the output real-world scaled?
- Yes. Meshes and NURBS exports are rescaled to real measurements and aligned to the Alias grid so the geometry drops into an existing package or vehicle architecture without manual repositioning.