Ok,  lets make a bliss! First place to start obviously is to generate or load a terrain. To keep it simple, I'll generate one. Click the size button on the landscape box. Set the "meters point spacing" to 30. I set my world size to 1025. Unregistered Users set it to 513, the results will be nearly the same. Click OK and then click the "Generate terrain" button. I set my method to Ridged Multi Perlin, and generate. For extra realism, select "Generate features on existing terrain" and generate again. After this, I click "Modify" and the "Glaciate" button. This gives us some nice lowlands.

Now that we have a terrain, find a nice POV (Point of View) that shows a lot of sky. Change the camera pitch up 10 to 15 degrees if you have to.