In order to see what sort of picture we get from our terrain, we need to generate a preview. On the Rendering Control panel, below, slide the slider underneath Render Preview over to the right, to get the best quality preview. The picture in the illustration below shows what we get. There is a big black area in the foreground, because our camera position is not high enough above the water to see it properly.
In the terrain I generated, I decided to put the line where you see it here. The camera position is top right, on a slight rise in the land so we are looking down across the lake towards a target position just below a mountain. This is the preview we get now.
Now, another preview render gives us this. Obviously there is much more to say about terrain generating, surface maps, and sight line choice, but these few simple instructions are enough to get you started at making landscapes. If you make a nice preview and want a bigger rendering, put the dimensions you wish to have your picture in the image size boxes on the Rendering Control panel, and click Render Image. When the image is complete, there is a SAVE button at the top left of the image window.
You can save your terrain using the SAVE button just below Terrain - NEW on the Landscape panel. Your surfaces, sight line, and all the other elements which make up your picture, are saved by using World File/Save World from the main menu at the top of the workspace. If you open your saved terrain and its matching world file, you can reproduce your picture at any time.
One final word of warning about sight lines. Do not put your camera position immediately behind ground higher than its postion. This would be the result of moving the sight line in my terrain into the corner, where the darker grey shows that the level of the land is lower than that just in front of it.
Now I want to move on, to look in detail at the rendering of water in Terragen version 7.x