1 layer,
first make a reasonably branched zsphere, all you need are extruding from the top sphere until you get the outer branches all around the model.
Color the adaptive skin a base color. Place on the canvas.
Then make the leaves, model a single leaf into the basic shape of a generic leaf and turn on mod>texture colorize. Choose some coloring.
Then take the spray stroke and fill the tree. That’s all there is to it and perhaps choose a toon shading modifier, (I did).
Now that we have leaves on the top of our tree, go over the trunk with the 3d brush to add some texture to it and around.
Grab the tree, you can either take 2 values - the very light tree type texture as you can see and the shaded one, incorporating all the texturing you have applied to the tree. I made use of both in my image.
Select the alpha with corresponding texture and the drag rectangle stroke at maximum intensity and place your trees.
Now you can make a whole sort of friendly trees.
I have left the original leaf and then dropped several little ones towards the ground. Hope you enjoy this image and find this a useful mini-tutorial.