Here is the problem, I have an old terrain made with Terragen 0.9 modified it in Terragen 2 with Power fractal shader v3, I save my .tgd, the same day I reopened the .tgd but the terrain refuse to load, I tried 3 times and at the third attempt the terrain finally load, after this I close Terragen 2 again and I retry the same procedure many time with the same result it took 3 or 4 times to load the terrain each time. Hope you understand my english.