# Smooth Step Outputs a smooth remapping from low-high to 0-1. ## Parameter Types **Smooth Step (float):** |Input |Type | |------|-----| |`In` |Float| |`Low` |Float| |`High`|Float| |Output|Type | |------|-----| |`Out` |Float| **Smooth Step (vector3f FA):** |Input |Type | |------|--------| |`In` |Vector3f| |`Low` |Float | |`High`|Float | |Output|Type | |------|--------| |`Out` |Vector3f| **Smooth Step (vector4f):** |Input |Type | |------|--------| |`In` |Vector4f| |`Low` |Vector4f| |`High`|Vector4f| |Output|Type | |------|--------| |`Out` |Vector4f| **Smooth Step (vector2h):** |Input |Type | |------|--------| |`In` |Vector2h| |`Low` |Vector2h| |`High`|Vector2h| |Output|Type | |------|--------| |`Out` |Vector2h| **Smooth Step (color3f FA):** |Input |Type | |------|-------------| |`In` |Color3| |`Low` |Float | |`High`|Float | |Output|Type | |------|-------------| |`Out` |Color3| **Smooth Step (vector3h FA):** |Input |Type | |------|--------| |`In` |Vector3h| |`Low` |Float | |`High`|Float | |Output|Type | |------|--------| |`Out` |Vector3h| **Smooth Step (half):** |Input |Type| |------|----| |`In` |Half| |`Low` |Half| |`High`|Half| |Output|Type| |------|----| |`Out` |Half| **Smooth Step (vector4h FA):** |Input |Type | |------|--------| |`In` |Vector4h| |`Low` |Float | |`High`|Float | |Output|Type | |------|--------| |`Out` |Vector4h| **Smooth Step (color4f FA):** |Input |Type | |------|-------------| |`In` |Color4| |`Low` |Float | |`High`|Float | |Output|Type | |------|-------------| |`Out` |Color4| **Smooth Step (vector2h FA):** |Input |Type | |------|--------| |`In` |Vector2h| |`Low` |Float | |`High`|Float | |Output|Type | |------|--------| |`Out` |Vector2h| **Smooth Step (vector2f FA):** |Input |Type | |------|--------| |`In` |Vector2f| |`Low` |Float | |`High`|Float | |Output|Type | |------|--------| |`Out` |Vector2f| **Smooth Step (color3f):** |Input |Type | |------|-------------| |`In` |Color3| |`Low` |Color3| |`High`|Color3| |Output|Type | |------|-------------| |`Out` |Color3| **Smooth Step (vector4h):** |Input |Type | |------|--------| |`In` |Vector4h| |`Low` |Vector4h| |`High`|Vector4h| |Output|Type | |------|--------| |`Out` |Vector4h| **Smooth Step (vector3f):** |Input |Type | |------|--------| |`In` |Vector3f| |`Low` |Vector3f| |`High`|Vector3f| |Output|Type | |------|--------| |`Out` |Vector3f| **Smooth Step (vector4f FA):** |Input |Type | |------|--------| |`In` |Vector4f| |`Low` |Float | |`High`|Float | |Output|Type | |------|--------| |`Out` |Vector4f| **Smooth Step (vector2f):** |Input |Type | |------|--------| |`In` |Vector2f| |`Low` |Vector2f| |`High`|Vector2f| |Output|Type | |------|--------| |`Out` |Vector2f| **Smooth Step (color4f):** |Input |Type | |------|-------------| |`In` |Color4| |`Low` |Color4| |`High`|Color4| |Output|Type | |------|-------------| |`Out` |Color4| **Smooth Step (vector3h):** |Input |Type | |------|--------| |`In` |Vector3h| |`Low` |Vector3h| |`High`|Vector3h| |Output|Type | |------|--------| |`Out` |Vector3h| ## Parameter descriptions - `In`: The input value to remap. - `Low`: The low end value of the input range; the default value is `0.0`. - `High`: The high end value of the input range; the default value is `1.0`. ## Discussion The `Smooth Step` node outputs a smooth remapping using Hermite interpolation. Any input with a value lower than the `Low` parameter results in an output of `0`. Any input with a value higher than the `High` parameter results in an output of `1`. --- 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)