with trees

        Updated to include Teck's suggestions so it looks less like machine and more like man(god?).  Now we get something that looks like this:


Yes, this looks much better methinks.  Only slight changes, just dropping in new terms really:

void Start() { terr = GetComponent<Terrain>(); terr.terrainData.treeInstances = new TreeInstance[]{}; float mapHeight = terr.terrainData.heightmapHeight; float mapWidth = terr.terrainData.heightmapWidth; for(int j=0;j<mapHeight;j+=4) { int treeLine = Random.Range(50,100); for(int i=0;i<mapWidth;i+=4) { TreeInstance t = new TreeInstance(); if(terr.terrainData.GetHeight(i,j)>treeLine) { Vector2 noise = Random.insideUnitCircle*0.01f; t.prototypeIndex = 0; t.position = new Vector3(((float)i/mapWidth)+noise.x,0,((float)j/mapHeight)+noise.y); t.color = Color.white; t.lightmapColor = Color.white; t.heightScale = 1; t.widthScale = 1; terr.AddTreeInstance(t); } } Debug.Log (j); } //terr.terrainData.treeInstances.SetValue (t,terr.terrainData.treeInstances.Length-1); terr.Flush(); }