Spring.SetHeightMapFunc(ApplyHeightMap, Cells)

function ApplyHeightMap(cells)
	for x = 0,sizeX,sqr do
		for z = 0,sizeZ,sqr do
			local height = cells[x][z] * flattenRatio + levelground -- avoid -2 < height < 2 because it looks weird...
			if height >= -1 and height <= 3 then
				height = 3
			end
			if height <= -150 then
				height = -150
			end
			SetHeightMap(x,z, height )
		end
		Spring.ClearWatchDogTimer()
	end
end