DocumentationSubstance 3DSubstance 3D Designer

Subtraction smooth

Last update: May 6, 2026

Subtraction smooth icon

In: SDF function > Operator

Description

Subtracts the volume of the SDF 1 shape from the SDF 2 shape, with adjustable smoothing applied at the intersection of the two.

INFO
To learn more about concepts and workflows involving SDF functions, go to the dedicated page: Working with SDF functions

Inputs

SDF 1 Float
The SDF shape being subtracted from.
SDF 2 Float
The SDF shape being subtracted from the SDF 1 shape.
Smoothness Float
The smoothing applied at the intersection of the two shapes.

Note: hard edges may appear where the smoothing radiuses intersect.
recommendation-more-help
substance-3d-designer-help-guide