Create a new document sized 1000px * 1500px, leave the background layer colour as white. Load the Grass Hilltopinto Photoshop, use the Rectangular Marquee Tool to select a portion of the image
Copy and paste the selection onto our docuemnt, name this layer as “Grass land” and resize it to fit the width of our document, with roughly about half of the height
As you can see we leave a large portion the upper area for the sky, personally I think this will help later on when we add more objects on the sky and make the image look deeper.