# Subtractive Mix Subtracts foreground from background values. ## Overview B - F ## Parameter Types **Subtractive Mix (float):** |Input |Type | |------------|-----| |`Foreground`|Float| |`Background`|Float| |`Mix` |Float| |Output|Type | |------|-----| |`Out` |Float| **Subtractive Mix (color4f):** |Input |Type | |------------|-------------| |`Foreground`|Color4| |`Background`|Color4| |`Mix` |Float | |Output|Type | |------|-------------| |`Out` |Color4| **Subtractive Mix (color3f):** |Input |Type | |------------|-------------| |`Foreground`|Color3| |`Background`|Color3| |`Mix` |Float | |Output|Type | |------|-------------| |`Out` |Color3| **Subtractive Mix (half):** |Input |Type| |------------|----| |`Foreground`|Half| |`Background`|Half| |`Mix` |Half| |Output|Type| |------|----| |`Out` |Half| ## Parameter descriptions - `Foreground`: The foreground input, represented by `F` in the mathematical equation. - `Background`: The background input, represented by `B` in the mathematical equation. - `Mix`: The weight of the blend effect. The higher the `Mix`, the greater the intensity of the blend operation, and the more the effect is visually apparent. The default value is `1`. Values outside of the range `0-1` produce an undefined effect outside of the node’s intended function. ## Discussion The `Subtractive Mix` node subtracts two inputs and uses the `Mix` input to determine the weight of the foreground in the blend, represented by the equation `B - F`. Higher values closer to `1` output a more intense subtractive mix, while lower values closer to `0` dim the effect. Below is an example of a simple node graph that uses the subtractive mix node to blend two images into a single material:  Below are two images and the resulting blended texture applied to a cube:    --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)