Stitching

One motion ends. The next begins. No one can tell where.

Select any two motions generated from text, video, or recorded in real-time, and Uthana automatically generates a natural, physically believable transition between them. No manual keyframing. No blending curves. Just seamless motion in under 10 seconds.

Try it free

Select. Adjust. Stitch.

1. Choose your motions

Pick any two motions saved to your Uthana account — one leading motion and one trailing motion.

2. Adjust position and timing

Position, speed, and orientation are critical to get the stitch right. The Uthana webapp empowers you to tweak those variables until they're just right.

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3. Generate the transition

The AI analyzes the end of your first clip and the start of your second, then generates a physically natural in-between.

Download for full control

Once you're happy with the stitched result, download it as a single FBX or GLB file with complete, clean keyframes from start to finish, including the transition. Open it in Blender, Maya, or any DCC and adjust whatever you need. The output is standard motion data, not locked or baked into a proprietary format.

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  • One continuous motion file
  • Export for Blender, Maya, Unity, Unreal, and Roblox Studio
  • Download with full keyframe data for final polish

Transitions that move like the character

Uthana's stitching model doesn't interpolate between clips, it generates new motion that bridges the gap. The AI models produce an in-between segment that accounts for mismatched positions, velocities, and body orientations, creating a transition that's intentional.

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  • Inference completes in under 10 seconds
  • Works between any two motions, regardless of source
  • Creates keyframes across the entire stitch

Physics-aware in-between frames

Your two clips don't need to match. If the first motion ends in a full sprint and the second starts from a standing pose, the stitching model generates a believable deceleration between them. Changes in trajectory, body orientation, and movement intensity are all resolved in the transition, and the motion accounts for how a real body would move between those two states.

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  • Bridges differences in speed and momentum naturally
  • Resolves changes in direction and body orientation
  • Handles transitions between different action types
FAQ
Frequently asked questions about Uthana stitching
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How fast is stitching?

Transitions are typically generated in under 10 seconds. You can go from selecting two motions to previewing the stitched result in well under a minute.

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Can I stitch more than two clips together?

Yes. You can chain multiple stitches to build longer sequences — for example, a walk into a jump into a landing into an idle. Generate each transition independently, then add the stitched motion as the new leading or trailing motion and chain the sequence as long as you need.

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Can I edit the stitched result?

Yes. You can preview the full stitched sequence in the browser, and when you download it as FBX or GLB, it comes with full editable keyframes — so you can refine any part of the motion in your DCC of choice.

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Is stitching available through the API?

Full support for stitching is available in the webapp. API access is currently in preview - it's in an unstable state with changes expected soon. For the most technically inclined users, try stitching programatically with the API.

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Does stitching use my download seconds?

Stitching uses download seconds for the entire motion. We recommend stitching before downloading leading and trailing motions so you don't download the same motion twice.

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What happens if my two motions are very different?

The stitching model will generate its best attempt at a natural transition between the two. The more physically plausible the transition is in real life, the better the result will look. A jog into a jump will stitch more cleanly than a seated pose into a mid-air spin — but you can always preview instantly and try different combinations.

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Can I control how long the transition is?

Yes! Stitch length is one of the many controls users have before stitching the motions, along with positioning and character speed.

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Can I stitch motions that are on different characters?

Yes! You can take advantage of Uthana's ability to re-target any motion onto any rig to accomplish this. Choose which character you want to have the stitched motion on, and the leading and trailing motions will automatically be applied to that character.

Studio & partner toolchain

Join us in co-developing the future of AI-driven animation.

Style transfers

Apply your game style to generic motions across your team's models.

Integrations

Leverage the Uthana platform in your development pipeline or game environment.

Data siloing

Train bespoke models, or organize and label your data with our ML tools.

Let's build to your needs

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