Build Regular Solid¶

In one sentence: Create a mesh primitive (cube, cylinder, sphere, cone, ellipsoid, or torus) directly in the Mesh workbench without needing a B-rep solid first.

Overview¶

Workbench: Mesh
Menu: Mesh → Meshes → Build Solid…
Command: Mesh_BuildRegularSolid
Shortcut: none

Opens the Regular Solid dialog to create a mesh primitive directly as a Mesh::Feature, without going through the Part workbench.

Intuition¶

The mesh primitives here are triangulated approximations of the same shapes available in Part workbench (cube, sphere, cylinder, etc.). They are useful when you need a quick mesh reference shape for boolean operations or visual comparisons in the Mesh workbench, without the overhead of creating a parametric B-rep solid first.

For engineering use, the Part workbench primitives are always preferable — they are exact, not approximate. Use Build Regular Solid only for mesh-native workflows.

When to use it¶

You need a quick mesh reference shape for a mesh boolean operation.
You are testing mesh operations and need a clean primitive mesh.
You want a mesh sphere or torus without creating a B-rep solid first.

When NOT to use it¶

Don't use it for engineering models — the meshes are approximate triangulations. Use Part primitives for exact geometry, then From Part Shape to convert.

Available primitives¶

Primitive	Parameters
Cube	Length, Width, Height
Cylinder	Radius, Length, Closed, Edge angle, Number of edges
Cone	Radius 1, Radius 2, Length, Closed, Edge angle, Edges
Sphere	Radius, Edge angle, Number of edges (lat/lon)
Ellipsoid	Radius 1, Radius 2, Edge angle, Edges
Torus	Radius 1, Radius 2, Edge angle, Edges

Common mistakes and pitfalls¶

These are mesh approximations, not exact geometry

The sphere, cylinder, and torus are tessellated approximations. Their dimensions are nominal — the actual surface deviates from the ideal surface by an amount determined by the number of edges (facets). Increase the edge count for a smoother approximation.