First commit

visuals/shaders/noise.gdshader

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+shader_type canvas_item;
+
+uniform sampler2D main_texture;
+uniform float granularity;
+uniform float opacity_limit;
+
+float random (vec2 uv) {
+    return fract(sin(dot(uv.xy,
+        vec2(12.9898,78.233))) * 43758.5453123);
+}
+
+void vertex() {
+	// Called for every vertex the material is visible on.
+	
+}
+
+void fragment() {
+	// Called for every pixel the material is visible on.
+	vec2 uv = UV;
+	uv.y = TIME * uv.y + TIME * 0.5;
+	uv.x = 2.0 * TIME * uv.x + TIME * 1.0;
+	float val = random(uv);
+	float op = random(-uv) / val;
+	float alpha = 1.0;
+	if(op < opacity_limit){
+		alpha = 0.0;
+	}
+	vec4 color = vec4(val, val, val, alpha);
+	COLOR = color;
+}
+
+//void light() {
+//	// Called for every pixel for every light affecting the CanvasItem.
+//	// Uncomment to replace the default light processing function with this one.
+//}