Thanks much both of you, I'll try using typed arrays. So... Much faster and smoother now. Still to slow for my taste (about 3 secs for the player order and the path's heightmap smoothing on a normal map with 8 players). And the paths partially devastate the nice terrain but, well... (Guess I'll try doing some terrain analysis to skip unneeded paths) Example (Overview/Valley/Dam, seed 6200, medium, 5 players): Map: realisticTerrainDemo2014-3-20b.zip