George Lucas, before he made the prequel movies, summed up very well how special FX/CGI should be used. It's a tool to help tell a story, but is not the story itself. (Unfortunately, IMO, he basically made the special FX the story of the prequels, but anyway). I have not found any of the CGI to be distracting or detracting from the Red Dwarf experience. Did I enjoy the original campiness the show offered? Yes, but I don't enjoy it any less because the shots of the Dwarf or Starbug are CG as opposed to models. It probably saves time and a bit of money, too.