shader-writer

Shader Writer

Save shaders to shaders/<name>.gdshader. Reference: Godot shaders docs.

Shader types

shader_type	For
canvas_item	2D nodes (Sprite2D, TileMapLayer, Control, AnimatedSprite2D)
spatial	3D meshes (PBR-aware)
particles	GPUParticles2D/3D process step
sky	World environment sky
fog	FogVolume

2D recipes (shader_type canvas_item)

Hit flash

shader_type canvas_item;

uniform float flash_amount : hint_range(0.0, 1.0) = 0.0;
uniform vec4 flash_color : source_color = vec4(1.0);

void fragment() {
    vec4 tex = texture(TEXTURE, UV);
    COLOR = mix(tex, vec4(flash_color.rgb, tex.a), flash_amount);
}

Drive flash_amount from code via a Tween: tween_property(material, "shader_parameter/flash_amount", 0.0, 0.15).from(1.0).

Outline (sample neighbors)

shader_type canvas_item;

uniform vec4 outline_color : source_color = vec4(0.0, 0.0, 0.0, 1.0);
uniform float outline_width : hint_range(0.0, 8.0) = 1.0;

void fragment() {
    vec4 tex = texture(TEXTURE, UV);
    if (tex.a > 0.0) {
        COLOR = tex;
    } else {
        vec2 px = TEXTURE_PIXEL_SIZE * outline_width;
        float a = 0.0;
        a += texture(TEXTURE, UV + vec2(px.x, 0.0)).a;
        a += texture(TEXTURE, UV + vec2(-px.x, 0.0)).a;
        a += texture(TEXTURE, UV + vec2(0.0, px.y)).a;
        a += texture(TEXTURE, UV + vec2(0.0, -px.y)).a;
        COLOR = vec4(outline_color.rgb, outline_color.a * step(0.01, a));
    }
}

Dissolve

shader_type canvas_item;

uniform sampler2D noise_texture : hint_default_white;
uniform float dissolve_amount : hint_range(0.0, 1.0) = 0.0;
uniform float edge_width : hint_range(0.0, 0.2) = 0.05;
uniform vec4 edge_color : source_color = vec4(1.0, 0.4, 0.1, 1.0);

void fragment() {
    vec4 tex = texture(TEXTURE, UV);
    float n = texture(noise_texture, UV).r;
    if (n < dissolve_amount) discard;
    float edge = step(n, dissolve_amount + edge_width);
    COLOR = mix(tex, edge_color, edge);
}