thanks both for the answers i find very difficult to have these plain faces on slant edges like Martin image, they make the difference on the shape, i also find sometimes very hard to control the geometry not exploding or imploding even after i use a compute node. This software gets so frustrating sometimes its not even fun.
Previewing things is almost impossible in the render view even with RTP, and every change needs a real render, that if its too smal in terms of output will just make you miss the details you are for (so you have to increase the micropoly details > increase render time by a lot).
I really think Terragen needs way more support for stuff like these..or in general some presets, i still think that a vast majority of interest and market this software lost is due to this. Over complicate method to work, preview, render, populate. Very slow visual feedback, lack of proper presets, scarce documentation.
Sorry but im frustrated.