Index: binaries/data/mods/public/maps/random/rmgen/painter/DunePainter.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/maps/random/rmgen/painter/DunePainter.js
@@ -0,0 +1,55 @@
+/**
+ *@param {Bool} type - ELEVATION_MODIFY or ELEVATION_SET
+ *@param {Number} scale - Global scale of dune size
+ *@param {Number} vertical_scale - Vertical scale of dune size
+ */
+class DunePainter
+{
+    constructor(type = ELEVATION_MODIFY, scale = 1, vertical_scale = 1)
+    {
+        this.type = type;
+        this.scale = scale;
+        this.vertical_scale = vertical_scale;
+    }
+
+    /**
+     *Dune base shape
+     *@param {Number} x [0,1] value
+     *@param {Number} xm [0,1] position of the dune crest
+     *@param {Bool} d true is dune, false is dome
+     */
+    dune(x, crest_x = 0.75, dune = true)
+    {
+        if (x < crest_x) return (1 - Math.cos(Math.PI * x / crest_x)) * 0.5;
+        if (dune) return (1 - Math.cos(Math.PI * (x - 1) / (crest_x - 1))) * 0.5;
+        return 1 - Math.cos(Math.PI * (x - 1) / (crest_x - 1) * 0.5);
+    }
+
+    paint(area)
+    {
+        let points = area.getPoints();
+        let length = points.length;
+        // 1st dune layer
+        let height1_1 = PerlinNoise(points, 6, 2, 1, 1.1, true);
+        let height1_2 = PerlinNoise(points, 3, 2, 1, 1, true);
+        let widht1 = 17.0 * this.scale;
+        // 2on dune layer
+        let height2_1 = PerlinNoise(points, 8, 1, 2, 2, true);
+        let height2_2 = PerlinNoise(points, 4, 2, 2, 2, true);
+        let width2 = 14.0 * this.scale;
+        // Loop all the points
+        let elevation_type = this.type ? (i) => g_Map.getHeight(points[i]) : () => 0;
+        for (var i = 0; i < length; i++)
+        {
+            // Main dunes creation
+            let v1 = ((points[i].x + height1_1[i] * 13 + points[i].y * 0.1) % widht1) / widht1;
+            let height1 = this.dune(v1, 0.60, false) * 9 * 0.9 + height1_1[i] * height1_2[i] * 150 * 0.1;
+            // Secondary dunes
+            let v2 = ((points[i].x + height2_1[i] * 13 + points[i].y * 0.1) % width2) / width2;
+            let height2 = this.dune(v2, 0.60, false) * 9 * 0.9 + height2_2[i] * 50 * 0.1;
+            let height = (height1 * 0.8 + height2 * 0.2) * this.vertical_scale * this.scale;
+            // Add or set height
+            g_Map.setHeight(points[i], height + elevation_type(i));
+        }
+    }
+}