Starting out, I want to stress that I'm keeping it as simple as I can. I'll be sharing tips, techniques and ideas, but these are fantasy landscapes, so I'm making up the rules. My rules will be influenced by the rules of drawing-composition, pattern, and perspective, but sometimes I'll break those rules. Gravity and science just aren't the same in a fantasy world - they are much kinder in mine. Nobody ever grows old, either, so you can keep on playing like a kid while you are drawing Fantasy Landscapes, lol.
Today, I'm starting with something very basic - the orientation of your piece of paper. You probably know the two orientations, Portrait and Landscape.
Aha! You might think - and rightly - that the landscape orientation is better for landscapes. It is. Except when it isn't.
As you see in the example below, there are short objects too, and there might be tall objects in a landscape orientation. But you would choose portrait, if those trees (or other tall objects) are the focus of your drawing.
Now add some Grass Tufts. Establish the horizon line, where the earth meets the sky. This will be the highest line of grass tufts behind the trees and the furthest point away from the viewer (unless you add clouds or the sun). Don't draw the line all the way across though. You'll be adding some trees that are closer than the horizon line, but cross over it because they are so tall.
Who-lee Trees, using the same steps as I did with the tall trees. These two set of trees have a relationship of balance. Each type of tree dominates one side of the page. But only one type should dominate the whole drawing, even if only a little. Therefore, when you draw the Who-lee Trees, you should think about the way they will relate to the Tall Trees.
One or the other should be dominate to the other. I wanted the Tall Trees to dominate, so I drew fewer trees, and made all of them shorter than the tallest Tall Tree. You might choose to let the Who-lee trees dominate.
I also made sure that the closest Who-lee Tree was further back than the closest Tall Tree, and the farthest was closer than the farthest Tall Tree. I felt this gave a good sense of balance between the two types. It isn't the only valid choice though. You might want to try changing that relationship and see how it changes the feeling of the drawing.
The darkness of the 'wholes' still gives more dominance, but I'll take care of that a little later.
Bunny, who looks a bit like the Big Rocks and is about the same size. If the rocks were bigger, the bunny would stand out more. By keeping them about the same size, the bunny is partially hidden. People might miss him, but those who find him will think he's a nice surprise.
I also decided to make my horizon line uneven and create a ridge
For a full list of Fantasy Landscape Step-outs, Step-by-steps, Step-wiselys and guide rules go here.