Godot CRT Shader Effect

Note: This plugin is based on the "Realistic CRT shader" by c64cosmin, available at godotshaders.com.

A high-quality CRT (Cathode Ray Tube) shader for Godot 4.x that simulates the look and feel of old CRT displays with various customizable effects.

Features

• 🎮 Simulates classic CRT display effects
• 🎨 Fully customizable parameters
• ⚡ Real-time editing support
• 🖥️ Multiple CRT effects supported
• 🛠️ Easy-to-use node-based implementation

Installation

1. Download or clone this repository into your Godot project's addons folder
2. In the Godot editor, go to Project -> Project Settings -> Plugins
3. Find and enable the "CRT Shader" plugin

Usage

1. Add a CanvasLayer node to your scene
2. Add a CRT node as its child
3. Adjust the CRT node's parameters to achieve the desired display effect

Parameters

Base Settings

• Resolution: Base resolution for pixel-perfect effects (default: 320x180)
• Update In Editor: Toggle real-time effect updates in the editor

Scanline Effect

• Scan Line Amount: Intensity of scanlines (0.0 - 1.0)
• Scan Line Strength: Contrast of scanlines (-12.0 to -1.0)

Screen Curvature

• Warp Amount: Amount of screen curvature (0.0 - 5.0)

Noise & Interference

• Noise Amount: Intensity of visual noise (0.0 - 0.3)
• Interference Amount: Strength of interference patterns (0.0 - 1.0)

Shadow Mask

• Grille Amount: Intensity of the shadow mask effect (0.0 - 1.0)
• Grille Size: Size of the shadow mask pattern (1.0 - 5.0)

Vignette

• Vignette Amount: Intensity of the vignette effect (0.0 - 2.0)
• Vignette Intensity: Darkness of the vignette (0.0 - 1.0)

Chromatic Aberration

• Aberration Amount: Strength of color separation (0.0 - 1.0)

Rolling Line

• Roll Line Amount: Intensity of rolling line effect (0.0 - 1.0)
• Roll Speed: Speed of the rolling line (-8.0 - 8.0)

Pixel Effect

• Pixel Strength: Pixel sharpening/softening (-4.0 - 0.0)

Example Code

# Using the CRT effect in your Godot script
@onready var crt_effect = $CanvasLayer/CRT

# Adjust effects dynamically
func _process(delta):
    # Example: Pulsing scanline effect
    var time = OS.get_ticks_msec() / 1000.0
    crt_effect.scan_line_amount = sin(time) * 0.5 + 0.5  # Pulsates between 0.0 and 1.0

License

This project is licensed under the MIT License - see the LICENSE file for details.

Credits

• Based on the "Realistic CRT shader" by c64cosmin
• Developed for Godot Engine 4.x

Contributing

Contributions are welcome! Please feel free to submit issues and pull requests.