Animating on ones, twos and threes
The oldest economy in hand-drawn animation is not drawing every frame. Holding one drawing for two frames is called animating on twos. It isn't only a saving, it's a stylistic choice: change the rhythm and the character of the motion changes with it.
What it means
On a 24 fps timeline, animating on ones means 24 distinct drawings per second. On twos each drawing covers two frames, so you need 12. On threes it drops to 8. The result is less fluid, but you can put more care into each drawing. Most classic television animation was made on twos, and nobody counts it as a flaw.
Which movement wants which rhythm
Fast, wide movements look choppy unless they're on ones: a camera pan or a whipping arm generally demands them. Dialogue, walks and everyday gestures are perfectly convincing on twos. Held poses and slow drifts survive threes without complaint. Rhythms can be mixed inside a single shot — professionals do it constantly.
Where to start in practice
If you're new, work on twos. It halves your drawing load and lands on a familiar cartoon feel. If a movement looks choppy, pull that section onto ones; if something looks too smooth and lifeless, push it to threes. The table below shows what each rhythm costs and where it works.
| Rhythm | Drawings per second at 24 fps | Feel | Works for |
|---|---|---|---|
| On ones | 24 | Smooth, fluid | Fast action, camera pans, whip movements |
| On twos | 12 | Classic cartoon | Walks, dialogue, everyday gestures |
| On threes | 8 | Rough, jumpy | Held poses, slow drifts, stylistic choice |
| On fours | 6 | Visibly stepped | Stop-motion feel, deliberate harshness |
Frequently asked questions
Does animating on twos look cheap?
No. A great deal of classic animation was made on twos. Viewers don't count drawings; they feel whether the rhythm suits the movement. Problems only appear when a fast action is left on twos.
Can I change rhythm within one shot?
Yes, and it's a common technique. Holding a character on threes while they're still and switching to ones as they launch both saves work and emphasises the change of speed. The only rule is to switch at a held pose rather than in the middle of a movement.
Is 12 fps the same as animating on twos?
The result looks similar but the timeline differs. On twos at 24 fps you stay on the 24-frame grid, which keeps sound and other layers in sync; working natively at 12 fps halves your smallest possible timing offset.
The brush draws alive. Kipirti is a sketchbook for animation: draw frame by frame, compare with onion skin, and export a GIF or a video. It opens in the browser — nothing to install.
Try it in the browser Get it on Google Play