If you want to use your own pictures, make sure the widths of both pictures are the same or similar in size.
Go to the picture of the girl and go to Edit >> Define Pattern.
Now with the picture with the wolf, go to Image >> Duplicate.
Select All and copy the entire image of the gradient.
Select All and copy the entire image of the wolf and gradient together.
Now using the Clone Stamp Tool, erase away the harsh edges from the Wolf picture.
Add effects and you’re done!