Harriet Aspden

Hey, I am going to be filming a peice in Qatar and really want to film part in the desert. I would like it to have the feeling of a western film, where somebody is walking toward the camera in the distance but doesnt get any closer or larger on the screen, with the heat waves etc. Any advice please? Especially with how to film the part where the actor doesnt get any closer, I'm clueless! Really appreciate it! Thanks :)