In: Atomic Nodes


Extended options since SD 5.0+


The Blend node blends or mix together two separate inputs with a user-defined Blend Mode and an optional Opacity mask. It is the most useful node of all Atomic nodes, almost any Graph you build in Substance 3D Designer will make use of this node.

Its functionality is similar to having two layers above one another in Substance 3D Painter or Photoshop, that blend together by the blending mode you set on the top layer.


  • ForegroundGrayscale Input / Color Input
    Top or foreground layer of the Blend operation
  • Background: Grayscale Input / Color Input
    Bottom or background layer of the blend operation.
  • OpacityGrayscale Input
    Optional Alpha mask input.

Blend nodes have dynamic inputs that switch between Grayscale and Color depending on your connections. A Blend Node can only blend two inputs of the same type. Connecting a Color and Grayscale input to the Foreground and Background will result in a dashed red connection line, signifying a calculation error. This is the number one reason new users run into problems with Color vs Grayscale connections: make sure both connections are of the same type!


  • Opacity0-1
    Opacity of the Foreground layer blending into the Background. It works independent to the Opacity input and acts as an additional multiplier to it.
  • Blending Mode: Copy, Add, Subtract, Multiply, Add Sub, Max, Min, Switch, Divide, Overlay, Screen, Soft Light
    Sets the blending operation to be used.
  • Alpha BlendingUse Source Alpha, Ignore Alpha, Straight Alpha Blending, Premultiplied Alpha Blending
    Determines blending behavior when color inputs have Alpha channels.
  • Cropping Area: Left/Right/Bottom/Top
    Allow for setting a custom cropping region that behaves like an additional Opacity mask. Any area cropped shows only the background.

Usage Guide

All blend modes are described with more detail on a separate, dedicated page.