2D Lightning, Electric Arc, plasma

Simple configurable lightning, electric arc, plasma shader. 

• Add a gradient to define the color of the arc.
• Add a noise texture.
• Adjust the remaining parameters to get the effect you’re looking for.

Shader code

shader_type canvas_item;

uniform sampler2D color_gradient;
uniform sampler2D noiseTexture;
uniform float speed: hint_range (0.0,5.0);
uniform float variation: hint_range (0.0,1.0);
uniform float width: hint_range (0.0,1.0);

void fragment(){
	
	vec2 noise_uv = vec2(UV.x+TIME*speed, UV.y-TIME*speed);
	float noise_sample = texture(noiseTexture, noise_uv).r;
	float x_offset = noise_sample*variation - variation/2.0;
	COLOR = texture(color_gradient, vec2((UV.x-0.5)/width + 0.5 + x_offset/width, UV.y));
}

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