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addons/godot-rapier2d/water_shader.gdshader

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+shader_type canvas_item;
+
+uniform float threshold = 0.8;
+uniform vec4 water_color: source_color = vec4(0.12,0.24,0.45,0.65);
+uniform vec4 test_color: source_color = vec4(1,0,1,1);
+
+uniform float speed = 0.1; // Speed of movement
+uniform float amplitude = 0.1; // Amplitude of movement
+
+uniform sampler2D water_texture;
+
+void fragment(){
+	float displacement = sin(TIME * speed) * amplitude;
+	vec4 screen_tex = texture(TEXTURE, SCREEN_UV).rgba;
+
+	float color_distance = screen_tex.r;
+	if (color_distance > threshold) {
+		COLOR = texture(water_texture, SCREEN_UV + displacement).rgba * water_color;
+	} else {
+		COLOR = vec4(0.0);
+	}
+}