Photoshop Drawing
Draw a full background scene using photoshop.
Start Off with a new document to the size you want, I chose 500×360 pixels.
Make A gradient shading from sky-blue to white

Draw a circle using the elliptical shape tool (
)
Make sure your settings are like this 

Click on Add Shape (
) and start drawing more circles to create a cloud-shape

Merge all (circle)layers together except the background
Go to the layers window and click on the little “F” for the layers style options (
)
Apply the following settings

Now repeat the process for more clouds placed randomly in the sky

Draw another circle with yellow, for the sun

Go to layer styles and apply the following settings


Now select the custom shape tool 
And choose the pinetree shape from the custom shapes menu
Draw in the tree shapes randomly using different sizes

Copy this pattern, paste into photoshop and define it as a pattern (edit>define pattern)

Now click on the layers style for the merged tree shapes and apply the following settings


Go back to Layer styles and do the following settings

and

This is your finished image, you can of course add more trees, clouds, and even add some birds or people












