For the second alternative, I'd personally propose a seamless slate or seamless stone texture mat. You're going to need to get a minimum of four seamless mats of the feel you choose. If you are new to stamping concrete, then the seamless texture mats are the easiest to know on. https://felixexnbp.blogdal.com/31831921/helping-the-others-realize-the-advantages-of-imprinted-concrete