How Many FPS is 3D? Exploring Frame Rates in Film and Animation

When we watch a movie or play a video game, we don‘t consciously think about the frame rate – the number of still images shown per second to create the illusion of smooth, continuous motion. But frame rate has a big impact on our viewing experience, especially when it comes to 3D animation and filmmaking. In this guide, we‘ll break down the common frame rates used in both traditional 2D and modern 3D animation formats.

The Cinematic Standard: 24fps

For over a century, the standard frame rate for film projection has been 24 frames per second (fps). This means a film photography reel captures and displays 24 distinct images each second to create the fluid motion we see in movies. This 24 fps standard was chosen for technical and cost reasons very early in film history and has persisted to today. Almost all major Hollywood films are still shot, edited, and displayed at this cinematic 24 fps rate.

When it comes to 3D rendered films like Pixar or Dreamworks animations, the computer generated imagery is also rendered out at 24fps to match conventional film. But the actual 3D animation process differs, which we‘ll get into shortly.

Television Broadcast Frame Rates

Unlike the consistent 24fps film standard, television broadcasting has adopted various frame rate standards depending on the region. In North America, a 30fps rate was chosen as the NTSC standard for broadcast. In most of Europe, 25fps is used as the PAL standard instead. So when watching TV or video shot for TV, you‘re typically seeing 30fps if you‘re in North America or 25fps in Europe.

3D Film Experiments with 48fps and Beyond

While 24fps has been the norm for cinematic filmmaking, some 3D filmmakers have experimented with higher frame rates for a smoother, more realistic look.

Notably, director Peter Jackson shot his 3D Hobbit trilogy at 48fps instead of the standard 24fps. The first film, An Unexpected Journey, was one of the first major feature films to be shot and projected at 48fps. Reactions to the look were mixed, with some complaining that the higher frame rate looked "too realistic" and took away the cinematic quality they were used to.

While 48fps 3D provides a smoother, sharper image, the camera motion can also look strangely sped up at times. So the jury is still out on whether higher frame rate stereoscopic 3D will become a new standard or remain a novelty. James Cameron‘s Avatar sequels are using a mix of 24fps and 48fps, likely to balance both looks.

Animation: 12fps and 24fps

It‘s common knowledge that animated films like Disney and Pixar are 24fps like live-action movies. But what‘s less known is that the actual 2D or 3D animation process rarely animates every single frame.

Instead, a technique called animating "on twos" is used, where animators create a new drawing every two frames. This cuts the workload in half while still achieving effective 12fps motion. When played back at 24fps, it simply displays each drawing twice.

So while animated films are rendered out at 24fps for theatrical playback, the underlying animation is typically drawn at 12 unique frames per second. Of course, for fast action scenes or elements in the foreground, animators may draw every frame for smoother 24fps motion.

3D Animation Software and Interpolation

Modern 3D animation programs like Autodesk Maya include powerful interpolation features to animate between keyframes set by the 3D artists. This means the software can automatically tween or morph the 3D models between the defined poses, saving animators from manually creating every single frame.

So animators can block out the timing and major poses, and the software handles the in-between frames. This makes the 3D animation process faster compared to traditional hand-drawn techniques.

Real-Time 3D: Targeting 60fps or Higher

When it comes to real-time 3D applications like video games and VR, achieving higher frame rates is crucial. Games target a minimum of 60fps for smooth animation and responsive control. This is twice the frame rate of standard film and TV.

Higher-end games aim for even faster 144fps or 240fps rates for silky smooth motion. This allows players to better react and respond in fast-paced games, especially competitive multiplayer titles. Techniques like motion blur are used to compensate for the faster camera movements compared to film.

The Limits of Human Perception

While machines can achieve incredibly fast frame rates into the thousands, human visual perception has limits. Research suggests the average person can perceive up to about 60fps. Beyond that, there is a diminishing return so that 120fps or 240fps may not look significantly different to many viewers.

However, individuals, especially serious gamers, may be able to perceive faster rates up to around 150fps. Younger viewers may also be able to see faster rates than older viewers. So while 60fps is typically sufficient for pleasing real-time animation, faster certainly doesn‘t hurt for those that can perceive the difference!

Conclusion

To summarize, 24fps remains the standard for cinematic filmmaking, while broadcast television uses slightly faster 30fps (NTSC) or 25fps (PAL) rates. 3D animation production results in 24fps output, but animators work at 12fps hand-drawn or use interpolation techniques in 3D software for efficiency. Finally, real-time 3D applications like games target at least 60fps for smooth animation and response, with diminishing returns beyond the limits of human vision at around 60-150fps. So while we may not think about frame rate as viewers, it has a significant impact on our experience across visual media!