Kadri,
Not only the Encoding but also the render detail was kept at 0.5
My friend told me that any decent render (for production) should be rendered at 0.75 minimum best at 0.8.
So, there is a lot for me to test and learn about Terragen.
I'm happy with this latest render test, only in the sense that I got rid of the nasty fireflies and most of the noticeable flicker but it is far from standard production levels.
This result is not what I expect to deliver in a decent production. I do need more control and quality thus more render time per frame
Thanks for comment, Hannes.
Cheers.