Smooth surface node

Smooths out (or “relaxes”) polygons, meshes and curves without increasing the number of points.

All Parameters Example files

See also: Subdivide, Divide, Fit, Sculpt

This node rearranges the existing points in the geometry to reduce roughness. To smooth by increasing the number of points, try using the Subdivide node.

Smooth can also smooth floating point attributes that are of size 1, 2 or 3, including color and texture coordinate.

If there is an ambiguity between using a vertex attribute or a point attribute, the point attribute is used.

Using Smooth

  1. Select the points or object you want to smooth.

  2. Click the Smooth tool on the Polygon tab.

You can change the smoothing specifications in the parameter editor.

Note

If you only want to smooth certain areas of your object, use the sculpt tool.

Tip

Turning the cutoff frequency up beyond 1 sometimes gives much smoother results than sticking to the default 0-1 range.

Parameters

Group

Subset of primitives to smooth.

Apply To

Apply smoothing operation to point position, texture uv’s, color or another attribute specified by name.

Attribute Name

Point or vertex attribute to smooth

Cutoff Frequency

Noise frequency to remove. The larger this value, the more it will keep the original shape of the geometry.

Smoothing Iterations

Number of smoothing steps.

Example files

Hills

$HFS/houdini/help/examples/nodes/sop/smooth/Hills.cmd

Load | Launch

The Smooth SOP is used to refine the distance between a number of points into more uniform values.

The process evens out minor variances in the points defining the curve, while still maintaining the value trends of the larger, overall curve.

Usages in other examples

Example name Example for
Down Hill Lava Flow

Material shader

Load | Launch