Ex-animator from the US here. Most Western animation has historically been done at 12fps ("on twos"); you go to 24fps for very fast motion or stuff you want to

Ex-animator from the US here. Most Western animation has historically been done at 12fps ("on twos"); you go to 24fps for very fast motion or stuff you want to be super-smooth. This holds even in big-budget 2D theatrical features[1]. You will also find no small amount of super-stylized motion - dig up "The Dover Boys" (dir. Chuck Jones), commonly cited as the first cartoon to experiment with the smears, multiple images, and other crazy stylizations of motion. Single-frame your way through that someday; it's full of amazing semi-abstract images. (First in the US, at least; there may have been people in the East playing with this as well, but there was very little cross-pollination at this time.) The big difference between the Western and Eastern animation traditions, in my mind, comes from different decisions in how to best allocate "pencil mileage". You have a budget of X number of miles of lines drawn by your animators for each project; how do you spend it? Westerners generally pursued "the illusion of life", favoring really fluid and subtle motion over a huge number of drawings. This meant that very few single drawings could be very complicated. Easterners, on the other hand, gravitated towards complicated character designs. You might spend four or five times as much effort drawing a single frame. This meant that very few motions could be fluid. Fluidity of motion × character design complexity = pencil mileage. Pencil mileage is fixed by your budget. Which one of those do you want to emphasize? You can't have both unless your budget is amazing. (This is also why animated commercials can have both; they can cost more per second than some features.) To eyes trained in one tradition, the other one looks like crap. Why is this Eastern cartoon barely more than a slide show half the time? Why is this Western cartoon full of such simplified designs? Personally, it took me many years to learn how to appreciate Eastern animation. (Also it is worth noting that most lovingly-animated Western games quickly converged on quickly popping into a motion as a result of a control input, with exaggerated settling into the new pose - look at Crash Bandicoot, Earthworm Jim, or Aladdin.) I am rambling. Mostly I just wanted to mention that my experience of the Western tradition (including years of single-stepping cartoons) is largely on twos, with occasional bursts of ones. [1] except for anything Richard Williams directed because he is kind of a total obsessive who would wander around the studio late at night and inbetween stuff onto ones that maybe should have never been on ones. See 'Raggedy Ann and Andy' for instance. Or if you want to actually see a decent movie hunt up the Recobbled Cut of 'The Thief and the Cobbler' because RA&A is pretty much 80 minutes of pure nightmare fuel.