shader_type canvas_item;

uniform float drift_strength : hint_range(0.0, 4.0) = 1.2;
uniform float drift_speed : hint_range(0.0, 2.0) = 0.22;
uniform float wave_scale : hint_range(0.001, 0.05) = 0.012;

void vertex() {
	float wave = sin(TIME * drift_speed + VERTEX.y * wave_scale) * drift_strength;
	VERTEX.x += wave * (UV.y * 0.7 + 0.3);
	VERTEX.y += sin(TIME * drift_speed * 0.73 + VERTEX.x * wave_scale) * drift_strength * 0.18;
}