Extrude Along Curve

Extrude Along Curve runs a cross-section along a path curve and turns it into a mesh. Use the built-in circle, square or rectangle, or wire in your own curve as the cross-section, and shape how thick it is along the way with the Thickness ramp. Use it for pipes, ropes, cables, rails, pillars and trim bands. The result already has UVs that follow the path, so it is ready to texture.

Inputs

Curve path

The curve the shape travels along.

Curve profile Optional

A curve to use as the cross-section instead of the built-in shape.

Outputs

Mesh

A mesh of the cross-section swept along the path.

Parameters

Parameter	What it does	Default
Profile	The built-in cross-section to sweep. Ignored when a curve is wired into the profile input. Options: Circle, Square, Rectangle	Circle
Radius	How big the circle is, from its center to its edge. Shown when Profile is Circle.	15 cm
Divisions	How many points go around the circle. More gives a rounder tube. Shown when Profile is Circle.	16
Size	How wide the square is. Shown when Profile is Square.	30 cm
Width	How wide the rectangle is. Shown when Profile is Rectangle.	30 cm
Height	How tall the rectangle is. A wide, flat rectangle makes a band or strip. Shown when Profile is Rectangle.	8 cm
Profile scale	Scales a curve wired into the profile input. The built-in shapes ignore it.	1
Thickness	How thick the sweep is from the start of the path to its end: 1 is full size, lower pinches it. Dip the middle for a pillar with a narrow waist.	Flat at 1
Path divisions	How many rings the path is cut into. More rings follow the Thickness ramp more smoothly.	16
End caps	Closes the two ends of the tube with flat faces. Has no effect on a closed path or an open profile.	On

See also

• Curve: draw the path and the cross-section.
• Procedural Height Map: wind a rope or grain pattern along the tube.
• Curve nodes: the other nodes that take a curve in.