---
title: Luminance
framework: shadergraph
role: symbol
role_heading: ShaderGraph Node
path: shadergraph/adjustment/luminance
---

# Luminance

Outputs a grayscale value containing the luminance of the incoming RGB color in all color channels.

## Parameter Types

Parameter Types Parameter descriptions Discussion The Luminance node takes in a color input and outputs that input as a grayscale image. The node computes the grayscale of an image by taking the dot product of the luma coefficients and the color vector. Below is an example of a simple node graph that uses the luminance node to convert an image to grayscale:

Below, the resulting texture applies to a cube:

## See Also

### Nodes

- [Remap](shadergraph/adjustment/remap.md)
- [Smooth Step](shadergraph/adjustment/smooth-step.md)
- [RGB to HSV](shadergraph/adjustment/rgb-to-hsv.md)
- [HSV to RGB](shadergraph/adjustment/hsv-to-rgb.md)
- [Contrast](shadergraph/adjustment/contrast.md)
- [Range](shadergraph/adjustment/range.md)
- [HSV Adjust](shadergraph/adjustment/hsv-adjust.md)
- [Saturate](shadergraph/adjustment/saturate.md)
- [Step (RealityKit)](shadergraph/adjustment/step-(realitykit).md)