Chisel
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Standard Shapes

The eight workhorse SDF primitives. Every one supports the common parameters; per-shape parameters are listed below.

These eight form the mesh family: cycle between them with [ / ] (Chisel tool active), or swap from the RMB → Type submenu. The three curve-based primitives are a separate family — a type swap never crosses between mesh and curve shapes.

Box

A rectangular box with optional edge rounding. The most-used primitive for hard-surface modeling.

Box

  • Size — base extent (default 2.0)
  • Half-Extents (X, Y, Z) — independent dimensions per axis, controlled by object scale
  • Rounding + Profile — round any subset of edges by tuning rounding and profile

Set rounding to 0 for sharp boxes, push it up for soft cubes, or change the profile (Sharp / Soft / Tight / Chamfer) for distinct industrial looks.

Sphere

A perfect sphere — smooth at any scale, no subdivision needed.

Sphere

  • Radius — distance from center to surface (default 1.0, soft max 10.0)

No rounding parameter — the sphere is already perfectly smooth.

Cylinder

A circular cylinder with optional edge rounding on the rim.

Cylinder

  • Radius — cap radius (default 1.0)
  • Depth — height along the local Z axis (default 2.0)
  • Rounding + Profile — applies to the top/bottom rim

Cone

A frustum (truncated cone). Adjust the cap to taper from a full circle down to a sharp point.

Cone

  • Radius 1 — base radius (default 1.0)
  • Radius 2 — top radius (default 0.0)
  • Depth — height along Z (default 2.0)
  • Cone Cap — 0.0–1.0. 0.0 = pointed apex, 1.0 = full-size top (i.e. a cylinder)
  • Rounding + Profile

Capsule

A cylinder with hemispherical end caps. Perfect for hot-dog shapes and limb references.

Capsule

  • Radius — caps + body radius (default 1.0)
  • Depth — straight (cylindrical) section length (default 2.0). Total capsule height = depth + 2 × radius.

No rounding parameter — the caps are already smooth.

Torus

A donut. Two radii, no rounding required.

Torus

  • Major Radius — distance from center to tube center (default 0.7, soft max 10.0)
  • Minor Radius — tube radius (default 0.3, soft max 5.0)

Prism

An N-sided regular prism. Set the side count with the Sides enum.

Prism

  • Sides — 3, 5, 6, or 8
  • Apex Angle (triangular prisms only) — 5°–175° (default 60°). Sharper or wider triangle profile.
  • Bevel — vertical edge rounding, separate from the cap rounding (0.0–10.0)
  • Bevel Profile — Round / Sharp / Soft / Tight / Chamfer for the vertical edges
  • Bevel Chamfer Smooth (when Bevel Profile = Chamfer)
  • Rounding + Profile — applies to the top and bottom rims

The triangular prism with Apex Angle adjustable is uniquely useful for chamfered struts, tool heads, and architectural beams.

Trapezoid

A box frustum — like the Cone primitive but with rectangular cross-section.

Trapezoid

  • Size — base extent (default 2.0)
  • Cone Cap — top scale (default 0.5). 0.0 = pyramid, 1.0 = box.
  • Bevel + Bevel Profile + Bevel Chamfer Smooth — controls for the four slanted vertical corners
  • Rounding + Profile — controls for the top and bottom rims

See also