Motion Control vs. Motion Brush
They sound similar, but they do completely different things. Here is the definitive breakdown.
If you are confused by the terminology in Kling AI 2.6, you are not alone. Many users (and even some official documentation) mix up these two core features.
Understanding the difference is the key to getting the results you want.
1. Motion Control
Technically: "Motion Transfer"
Input: Image + Reference Video
This is about Performance. You upload a video of a real person dancing, fighting, or speaking. The AI extracts the "skeleton" and rhythm of that performance and applies it to your static character.
Best for: Dance challenges, Acting, Character Animation.
2. Motion Brush
Technically: "Trajectory Control"
Input: Image + Drawn Path
This is about Direction. You paint over a specific area (like a cloud or a car) and draw an arrow. The AI simply moves those pixels in that direction.
Best for: Cinematic scenery, flowing water, simple object movement.
When to use which?
Scenario A: "I want my anime character to do the moonwalk."
Use Motion Control (Transfer). A brush cannot describe the complex leg movements of a moonwalk. You need a reference video of Michael Jackson to "drive" the character.
Scenario B: "I want the camera to fly over these mountains."
Use Motion Brush + Camera Control. You don't need a reference video. Just paint the sky and draw a forward arrow, or use the "Camera Pan" settings.