Index: binaries/data/mods/public/maps/random/rmgen/perlinNoise.js
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--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/perlinNoise.js
@@ -0,0 +1,29 @@
+/**
+ * Perlin noise.
+ * @param {object} point - Vector2d instance.
+ * @param {number} iterations - Must be > 0. The higher the more detailed the noise.
+ * @param {number} scale - A value > 1 zooms in and < 1 zooms out the noise.
+ * @param {number} multiplier - Range (0,1). Frequency reduction after each iteration.
+ * @return {number} - Range [-1,1].
+ */
+function perlinNoise(point, iterations = 3, scale = 5, multiplier = 0.75)
+{
+	if (iterations <= 0)
+		return 0;
+
+	let value = 0;
+	let frequency = 1 / scale;
+	let weight = 1;
+	let weightAccumulator = 0;
+
+	for (let i = 0; i < iterations; ++i)
+	{
+		value += weight * valueNoise2d(point.x * frequency, point.y * frequency);
+		weightAccumulator += weight;
+
+		frequency /= multiplier;
+		weight *= multiplier;
+	}
+
+	return value / weightAccumulator;
+}