Combining multiple Exposures is a great way to get unique images and is traditionally done with film. We are making a similar effect in Photoshop, which will give you a bit more control over how everything turns out.
Basically, having a WACOM TABLET is going to save you a lot of time in the long run. More control means less mistakes. There are not many things that you can just go buy to make you better, but this is one of them.
One of the biggest challenges after applying the new Background was making the grass line look realistic. In order to complete that task we create a new custom Brush from existing grass shapes, which is then used to define a Layer Mask.