Vignette with changeable blur size

vignetter shader ported from shadertoy to godot4 with changeable blur size 

Shader code

//Vignette Shader

//see more info about shaders here --> https://github.com/TechnoLukas/My-favourite-shaders-links
//ported with https://github.com/jayaarrgh/shadertoy2godot (with some hand fixing)
//on shadertoy https://www.shadertoy.com/view/WsGSD3

shader_type canvas_item;
uniform float size;

void fragment() {
	
	vec2 uv=UV;
	vec2 suv = abs(uv * 2.0 - 1.0);
	vec4 col = texture(TEXTURE, uv);
	vec2 u = vec2(size / (1.0/TEXTURE_PIXEL_SIZE));
	u = smoothstep(vec2(0), u, 1.0 - suv);
    
	COLOR = col * u.x * u.y;
}

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