https://fr.tuto.com/photoshop/peinture-digital-photoshop-apprenez-a-creer-un-decor-western-photoshop,115941.html?fbclid=IwAR2vAASgAMDeTk4xv4MHuygSUoAwOkdZhHBSzAjihIfezG3qo_MnPbTqERk

Tutorial here: