a5c-ai/godot-shaders

Godot Shaders Skill

Shader development for Godot Engine.

Overview

This skill provides capabilities for creating shaders using Godot's shading language and visual shader system.

Capabilities

Shader Types

• Spatial shaders (3D)
• Canvas Item shaders (2D)
• Particles shaders
• Sky shaders

Visual Shaders

• Node-based authoring
• Custom nodes
• Shader presets
• Export to code

Shader Language

• GLSL-like syntax
• Built-in functions
• Uniforms and varyings
• Render modes

Effects

• Post-processing
• Material effects
• Screen-space effects
• Procedural textures

Prerequisites

• Godot 4.0+
• Shader knowledge

Usage Patterns

Spatial Shader

shader_type spatial;

uniform vec4 albedo_color : source_color = vec4(1.0);
uniform float metallic : hint_range(0, 1) = 0.0;
uniform float roughness : hint_range(0, 1) = 0.5;

void fragment() {
    ALBEDO = albedo_color.rgb;
    METALLIC = metallic;
    ROUGHNESS = roughness;
}

Canvas Item Shader

shader_type canvas_item;

uniform float outline_width = 2.0;
uniform vec4 outline_color : source_color = vec4(0.0, 0.0, 0.0, 1.0);

void fragment() {
    vec4 color = texture(TEXTURE, UV);
    // Outline logic
    COLOR = color;
}

Best Practices

1. Use visual shaders for prototyping
2. Optimize texture samples
3. Handle precision carefully
4. Profile shader complexity
5. Test on target hardware

References

• Godot Shaders