I'd just like to add I saw Jurassic Park back in '93 several times and was utterly sold on both the practical & cgi effects. Ditto with Terminator 2 (though obviously that cannot really be termed 'realistic' unless one hangs out with shape-shifting cyborgs from the future). Seen today, I think the liquid metal version of the T2 looks pretty bad, and the bronto scene from Jurassic Park still pretty good, but I can now recognise the CGI 'look', and slightly lower resolution levels than its surroundings. Something my eye wasn't trained for back then. Ditto for people who - for example - don't notice film grain, and those that do. Those that don't notice matting lines, and those that do. You can't apply the same sweeping generalisations for everyone. I know what to look for now with cgi (a particular kind of motion blur, texture movements, incorrect darkness levels compared with the surroundings etc), I didn't then. I remember saying to friends it looked totally realistic back then. Today I wouldn't. Don't forget we only had VHS tapes back then too to refer to after the film had left cinemas. Today with HD our eyes are all far more 'fake savvy' than years before.