Motion Brush is a video generation control that lets you draw paths directly on a frame to specify how objects, characters, or the camera should move. Instead of describing motion in words ("the ball moves from left to right") — which the model may interpret loosely — you paint the exact trajectory on the frame with your cursor. The model then generates video where the selected element follows that path. This provides a level of motion precision that text prompts fundamentally cannot: you specify not just direction but the exact curve, speed (by path density), and endpoint of the movement.
Click on an object, person, or region in your image, then draw the path you want it to follow. Kling 3.0 identifies the selected element and generates motion along your drawn trajectory. Works on foreground subjects, background elements, and even the overall camera viewpoint.
Draw separate paths for different elements in the same frame. A person walks left while a bird flies right and the camera slowly tilts up. Each path is independently controlled. The model resolves interactions between the moving elements — occlusion, shadows, parallax — automatically.
The spacing of your brush strokes indicates speed. Dense, short strokes mean slow movement. Long, widely spaced strokes mean fast movement. This gives you temporal control beyond just direction — a slow approach that accelerates into a sprint is a single drawn path with changing density.
Instead of selecting an object, draw a path on the background to specify camera movement. A straight horizontal line creates a pan. A curved line creates an arc. A line toward the subject creates a push-in. This replaces text-based camera instructions ("dolly in", "pan left") with exact spatial control.
Use Motion Brush with uploaded images (image-to-video) or with generated first frames from text prompts. In both cases, draw your paths on the first frame before generating the full video clip.
After drawing, Kling 3.0 shows a ghost overlay of the drawn path on the frame so you can verify the trajectory before spending generation credits. Adjust or redraw paths until the preview matches your intent, then generate.
Go to Sunra Video and select Kling 3.0 from the model dropdown. Upload an image or generate a first frame from a text prompt.
Click the Motion Brush button in the toolbar above the frame preview. Your cursor changes to a brush indicator. The frame is now ready for path drawing.
Click on the element you want to move (a person, an object, the background for camera motion). Draw the path you want it to follow with your mouse or trackpad. The path appears as a colored line on the frame. Draw slowly for slow movement, quickly for fast movement.
Click a different element and draw another path. Each element gets a different color indicator. You can add up to 5 motion paths per frame. Use the eraser tool to remove or redraw any path.
Review the ghost overlay showing all drawn paths. Adjust any path by clicking it and redrawing. When satisfied, click Generate. Kling 3.0 renders the video with each element following its assigned trajectory.
Whether you're a solo creator, an agency, or a brand — every model adapts to how you work.
A luxury watch on a dark velvet surface. Studio lighting with rim light.
Model: Kling 3.0 · Motion Brush: semicircle arc around the watch, slow speed · Duration: 6s · Aspect: 16:9
A woman in a red coat stands at the entrance of a library. Warm interior lighting, tall bookshelves.
Model: Kling 3.0 · Motion Brush: curved path from door to reading area, medium speed · Duration: 10s · Aspect: 16:9
A city intersection at dusk. Cars at a traffic light, pedestrians waiting on the sidewalk.
Model: Kling 3.0 · Motion Brush: Path 1: cars straight across intersection. Path 2: pedestrians crossing perpendicular. Path 3: camera slow zoom in · Duration: 8s
Close-up of a detective's face in a dark room. Single overhead light. Tense atmosphere.
Model: Kling 3.0 · Motion Brush: slow straight path directly toward the subject (camera push-in) · Duration: 5s · Aspect: 2.39:1
Draw an exact camera orbit path around a product image — a smooth arc, a zigzag reveal, or a spiral descent. Text prompts like "orbit the product" produce unpredictable arc angles and speeds. Motion Brush lets you draw exactly the camera path a commercial director would specify on set.
Direct character movement through a scene the way a director blocks actors on stage. Draw a path showing a character entering from the left, pausing at the center, then exiting right. Add a second path for another character moving in the opposite direction. This level of staging control is impossible through text prompts alone.
Draw the exact trajectory of a thrown ball, a racing car, or a gymnast's flip. Useful for sports analysis animations, training visualizations, and action sequence previsualization. The drawn path determines the precise arc, not the model's interpretation of "throw the ball to the right."
Draw different-length paths for foreground, midground, and background elements to create parallax depth effects. Foreground elements move more than background elements, simulating camera motion through a 3D scene from a 2D image. This technique turns flat landscape photos into cinematic establishing shots.
| Kling 3.0 Motion Brush | Other Approaches | |
|---|---|---|
| Motion specification | Draw exact paths on the frame with your cursor — pixel-level trajectory control | Text prompt: "move left" (direction only, no exact path). Camera presets: fixed options (pan, zoom, orbit) with no custom curves |
| Multi-element control | Up to 5 independent motion paths for different elements in the same frame | Text prompts: difficult to specify independent motions for multiple elements simultaneously. Most models apply motion globally |
| Speed control | Stroke density on the drawn path controls speed — slow, fast, accelerating, decelerating within one path | Text prompts: "slowly" or "quickly" (binary speed control). No acceleration curves |
| Learning curve | Intuitive — draw what you want. Requires spatial thinking but no technical knowledge | Text prompts: easy to start but hard to specify complex motion precisely. After Effects keyframes: full control but requires software expertise |
| Unique to Kling? | Kling 3.0 is currently the only major AI video model with interactive drawn motion paths | Sora 2, Veo 3.1, Seedance 2.0: no equivalent feature. Runway Gen-3: had a simpler motion brush in 2024 but discontinued it |
Motion Brush works best when paths follow physically plausible trajectories. A person walking in a smooth curve looks natural. A person teleporting in a zigzag creates artifacts. The model tries to follow your path exactly, but it also tries to maintain physical plausibility — conflicting signals produce poor results.
Multi-element paths with 4–5 elements interacting are harder for the model to resolve. Start with one path on the main subject. Once that looks right, add a second path. Build complexity incrementally rather than drawing all paths at once and hoping they all work.
5-second clips maintain tighter adherence to drawn paths than 15-second clips. Over longer durations, the model may drift from the drawn trajectory, especially for complex curves. For long sequences with precise paths, generate 5-second segments and chain them in Flow.
If you draw a camera pan to the right AND an object moving to the right at the same speed, the object will appear stationary on screen. Think about relative motion. A camera path left + object path right creates dramatic relative movement. Same direction at same speed cancels out.
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