Surfacing

Onshape provides a parametric surfacing toolset including Boundary Surface, Loft, Face Blend, Fill, Ruled Surface, Offset Surface, Move Boundary, and Mutual Trim. Surfaces can be thickened or solidified using Enclose and Thicken, or repaired using direct editing tools like Delete Face, Move Face, and Replace Face.

Yes. Apply a G3 constraint between two curves in a sketch, or create Match Flow (G3) transitions with the Bridging Curve tool. Connection Analysis and Curve/Surface Analysis evaluate transitions across G0 (Position), G1 (Tangent), G2 (Curvature), and G3 (Flow).

Yes. Onshape supports industrial design and Class-A surfacing workflows through single-span Bézier curves, Match Flow (G3) bridging curves, degree-elevation editing, and real-time curvature combs. Surfaces remain fully parametric and live alongside downstream mechanical features in the same unified Part Studio.

Onshape features built-in real-time diagnostic tools including Zebra Stripes, Curvature Combs, Dihedral Analysis, and Reflection Analysis (such as virtual light tunnel and studio room environments). These tools evaluate smoothness, detect surface imperfections, and verify tangency without requiring third-party inspection software.

Surfaces in Onshape are converted into solid bodies primarily using the Enclose or Thicken features. When a collection of surfaces forms a fully watertight, closed boundary (airtight volume), the Enclose tool instantly solidifies it. Alternatively, individual or knitted surfaces can be assigned a wall thickness using Thicken.

Yes, Onshape includes a dedicated Surface Flattening tool that transforms complex, non-developable 3D compound curved surfaces into precise 2D flat patterns. This enables rapid manufacturing preparation for fabrics, composites, leather, sheet metal, and thermoformed plastics directly within the browser.

In Onshape, a Loft creates transitional shapes blending through a sequential series of cross-sectional profiles along optional guide rails. A Boundary Surface creates geometry within a closed four-sided or multi-sided boundary curve grid, offering bidirectional (U and V) tangency and curvature control across all perimeter edges.

Onshape includes built-in geometry repair and direct modeling tools to repair faulty imported neutral files (STEP, IGES, Parasolid). Designers can heal gaps, untrim damaged faces, replace missing patches with Fill or Boundary Surface, and simplify complex topological errors without file corruption.