Regardless of the level of realism, the fact that you´re not seeing a photorealistic human being immediately tells your brain it´s another reality. It´s instinctive. It´s the same thing with CGI or green screen, there will always be an instinct telling you it´s not real. The way to deal with it is not overanalyzing, nitpicking every detail, if I do that, I´ll destroy every FX and animation technique. The SM FX crews are doing some of the bost jobs in the market today - they didn´t win an oscar for nothing - but if you think someday you´re gonna see a Spider-Man swinging between building that will look entirely photorealistic, it´s just not gonna happen. The best you can do is suspend disbelief. When I saw the SW movies, it was easy to tell Chewie is just a guy in a suit, sometimes the scale of the models was notable too. You forget about it and immerse yourself in the fantasy, or there will always be a problem.