Gamma Correction

Usage:

1. Create a CanvasLayer and add a ColorRect as child.
2. In the ColorRect  add a new ShaderMaterial.
3. In the ShaderMaterial add a new Shader.
4. Copy the script below into the Shader-Editor.

Documentation

• gamma: Defines the gamma correction value. Default is 1.

Hint

This shader is written for Godot 4.

Shader code

shader_type canvas_item;

uniform sampler2D screen_texture : hint_screen_texture, filter_nearest_mipmap, repeat_enable;

uniform float gamma: hint_range(0.0, 2.0, 0.05) = 1.0;

void fragment() {
    vec4 color = texture(screen_texture, SCREEN_UV);
    color.rgb = pow(color.rgb, vec3(1.0 / gamma));
    COLOR = color;
}

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