How to Create a Smooth Shake Effect in Alight Motion
A smooth shake effect can add impact to music edits, transitions, beat cuts, and short-form videos. The effect looks best when the movement is short, controlled, and synchronized with the right moment.
In this tutorial, you will learn how to create a smooth shake effect in Alight Motion using position, rotation, keyframes, easing, and motion blur.
Step 1: Create Your Project
Open Alight Motion and create a new project with the resolution and frame rate required for your final video.
Import your video and place it on the timeline.
For a vertical Reel or Short, a 9:16 project is a practical choice.
Find the exact point where you want the shake to happen. A strong music beat, transition, logo appearance, or impact moment can work well.
Step 2: Find the Beat
Play the music and identify a strong beat.
Place the playhead at the beat and use it as the main impact point.
The basic timing should be:
Normal → Quick movement → Impact → Recovery → Normal
The strongest movement should occur around the beat rather than keeping the video shaking continuously.
Step 3: Add Position Keyframes
Select your video layer and open Move & Transform → Position.
Add the first keyframe slightly before the beat and keep the video at its normal position.
Move the playhead forward a few frames and add another keyframe. Move the video slightly to one side.
For example:
- X: +10 px
- Y: -4 px
Move forward a few more frames and create another keyframe.
Move the video in the opposite direction:
- X: -12 px
- Y: +6 px
Add another keyframe and return the video to its original position.
The basic movement is:
Normal → Right/Up → Left/Down → Normal
This creates the main shake effect.
Step 4: Control the Shake Strength
Use small position changes first. Large movements can make the video look unstable.
For a starting point:
- Light shake: 5–10 px
- Medium shake: 10–20 px
- Strong impact: 20–30 px
For face-focused videos, start with a smaller movement so the subject remains easy to follow.
Step 5: Add Subtle Rotation
Position movement can sometimes look mechanical when used alone. A small amount of rotation can make the shake feel more natural.
Open Move & Transform → Rotation and add rotation keyframes around the same section.
A simple setup is:
| Keyframe | Rotation |
|---|---|
| Start | 0° |
| Movement 1 | +1° |
| Movement 2 | -1.5° |
| Recovery | 0° |
A starting range of 0.5°–2° is suitable for most normal shake effects.
Keep the rotation subtle so it does not distract from the subject.
Step 6: Adjust Timing and Easing
The distance between keyframes controls how quickly the shake moves.
For a quick beat effect, keep the complete shake around 0.15–0.30 seconds.
Use this movement pattern:
Quick acceleration → Impact → Smooth recovery
If the movement looks robotic, adjust the keyframe spacing and apply suitable easing.
The recovery should bring the video back to its normal position smoothly.
Step 7: Add Motion Blur
Motion blur can make fast shake movement appear smoother.
Apply Motion Blur to the video layer or relevant effect according to your Alight Motion setup.
Start with a low amount and preview the result.
Too much motion blur can make faces, text, and fine details look soft.
A practical approach is:
Low blur → Preview → Increase gradually if needed
Recommended Smooth Shake Settings
Use these values as a starting setup for a short beat-synced shake.
Position
- Start: 0, 0
- Keyframe 2: +10, -4
- Keyframe 3: -12, +6
- Keyframe 4: +6, +2
- Final: 0, 0
Rotation
- Start: 0°
- Keyframe 2: +1°
- Keyframe 3: -1.5°
- Keyframe 4: +0.5°
- Final: 0°
Duration: Approximately 0.18–0.25 seconds
Motion Blur: Start with a low amount and increase gradually if necessary.
Important: These values are a starting setup. Adjust them according to your footage, project resolution, and the intensity of the beat.
Common Shake Effect Mistakes
Excessive Movement
If the frame jumps too far, reduce the X and Y position values.
Continuous Shaking
Using the shake throughout the entire clip can make the video distracting. Use short shake bursts for important beats or transitions.
Too Much Rotation
Large rotation values can pull attention away from the subject. Start with subtle rotation.
Excessive Motion Blur
Too much blur can reduce image detail. Keep the blur low enough to maintain clarity.
Final Settings Checklist
Before exporting, check:
- Shake duration: 0.15–0.30 seconds
- Position movement: 5–20 px starting range
- Rotation: 0.5°–2° starting range
- Motion blur: Low to Medium
- Beat timing: Strongest movement aligned with the beat
- Recovery: Smooth return to the original position
- Preview: Check the effect in the complete video
Conclusion
A smooth shake effect in Alight Motion depends on controlled movement and accurate timing. Use small position changes, subtle rotation, suitable easing, and light motion blur to create impact without distracting from the main subject.
Start with the recommended settings and adjust them according to your footage and music.
