That's all very good news. Thanks to the new version, I've fired up Terragen for the first time in months (perhaps years) and find it very enjoyable. Water still takes an insane amount of time to render, even on four cores, but we're clearly getting there. So thanks guys for keeping at it. With the memory leak fixed and 64-bit support (I need to render at quite high res) I honestly can't think of anything vital that would need urgent improvement, apart from my Terragen skills that is...