Video games are not a movie. They have way less budget – and way way way less budget for cutscenes compared to a whole movie.
A video game is made in engine- meaning its not a static thing but it can change and react to how you play.
If there is a cut scene in the game – it can be fully in engine like the rest of the game or some combination of CGI and engine .
The cutscene will never have the same bduget as a full movie so they never look as good, but most of the time they dont even try to look 100% real because they know gamers dont care
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