Curvy Spline Segment

Smooth Edge Tangent

Enable to smooth the end tangent towards the next segment's orientation. This is most useful for linear splines to prevent sharp orientation breaks.

Bake Orientation

(Dynamic orientation only)

Enable to automatically set the transform's rotation to the calculated dynamic orientation. To set the rotation only once, disable this option and use the button below.

Orientation Anchor

(Dynamic Orientation only)

When enabled, this Control Point acts as an orientation “target” in dynamic Orientation mode.


(Orientation Anchor only)

Using this option you can add a swirl to the current “anchor group”. An Anchor group ranges from the current Control Point up to the next defined Orientation Anchor (or the end). Options are:

  • Segment - swirl over each segment
  • AnchorGroup - swirl over the whole Anchor Group at a constant F distance
  • AnchorGroupAbs - swirl over the whole Anchor Group at a constant world unit distance

(Swirl only) The number of 360° turns swirl should apply

(Bezier splines only)

Auto Handles

If enabled, handle direction is automatically set to form a smooth curve


(Auto Handles only) The handle length in % of the adjacent segment length to use when automatically placing handles

Handle In

The incoming handle position in local coordinates

Handle Out

The outgoing handle position in local coordinates

(TCB splines only)

Local Tension/Continuity/Bias

If enabled, individual TCB values are used instead of the values defined at the spline

Synchronize TCB

If enabled, a single value is used for both start and end of a segment. If disabled, each side can be parametrized separately.


Individual TCB values

(B-Spline splines only)


The degree of the piecewise polynomial functions. Is in the range [2; control points count - 1]


Make the curve pass through the first and last control points by increasing the multiplicity of the first and last knots. In technical terms, when this parameter is true, the knot vector is [0, 0, …,0, 1, 2, …, N-1, N, N, …, N]. When false, it is [0, 1, 2, …, N-1, N]

The following values are used by some Curvy Generator modules.

The metadata component is created automatically by Curvy

The material ID of the segment.

When using the Shape Extrusion module, additional patches of vertices are being created for different Material IDs.

Once you have defined different Material IDs, you can use the Add Material button in the Volume Mesh module to assign additional materials!
Hard Edge

Determines if the Control Point forms a hard edge, i.e. an additional vertex will be created when using this spline as an extrusion shape.

This is useful for proper lightmapping of sharp corners, e.g. if extruding rectangles

Max Step Distance

The maximum distance in world units between two generated vertices of this segment. Used by some extrusion modules

Extended UV

Use this section to define UV's U for a cross section point. The spline can subdivided into different UV islands. An UV island is a range of UV coordinates that is not continuous to the previous or next UV island.


When this box is ticked, an UV island is created starting at this point. This means that this point will have two U coordinates: one used for the previous island (the one ending at this point), and one used for the next island (the one starting at this point). This feature is not expected to be used with closed splines.

Explicit U

When this box is ticked, the U value of this point can be set explicitly. This feature is not expected to be used with closed splines.

First U

The explicit value of U. By clicking on the button bellow it, you can set the U value of a point based on the U value of it's neighbors.

Second U

When this point is an UVEdge (on the edge of two islands), FirstU will define the U value being part of the first island (the one ending at this point), while Second U will define the U value being part of the second island (the one starting at this point)