Engine flame

A shader that creates an effect of a jet/space engine exhaust. After some modifications can be used to create a simple fireplace.

Shader code

shader_type spatial;

uniform sampler2D noise;
uniform sampler2D gradient;

float fresnel(float amount, vec3 normal, vec3 view)
{
	return pow(
		(clamp(dot(normalize(normal), normalize(view)), 0.0, 1.0)),
		amount
	);
}

void fragment() {
	float basic_fresnel = fresnel(2.0, NORMAL, VIEW);
	vec4 pixel = texture(noise, UV * vec2(1, 0.25) + vec2(0, 2.0 * TIME));
	vec4 color = texture(gradient, vec2(UV.y, 0));
	ALBEDO = pixel.rgb * color.rgb;
	EMISSION = ALBEDO * 5.0;
	ALPHA = pixel.r * pow(UV.y, 1) * pow(basic_fresnel, 2.0);
}

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