How to Make an AI Body Shake Video From One Photo

To make an AI body shake video on VdoBloom you upload one photo to the Body Shake tab, pick one of four motion presets — Smooth, Dynamic, Natural or Rhythmic — and generate; on the default Runway Gen-3 model at 720p for 5 seconds it costs 10 credits, which is $0.50. The effect is deliberately narrow: the person in your photo turns around to show their back, then the hips and body start moving with a smooth, natural jiggle. It is a dance-motion clip, not a full choreography generator, and knowing that up front is the difference between a usable result and three wasted renders.

What the Body Shake effect actually does

Body Shake is one of VdoBloom’s keyframe effects. Behind the tab, your photo goes through a WAN 2.7 keyframe stage that rebuilds a clean, upright three-quarter frame with the hips and shoulders clearly readable, and only then hands that keyframe to the video model you selected. That two-stage design is why the identity holds up better here than on a raw image-to-video prompt — the keyframe locks the face, hair and outfit before any motion is generated.

The motion itself is short and looping in feel. On PixVerse models the tab requests the fast motion mode, so the shake reads as energetic rather than slow-motion. What you get is a music-video style beat: turn, settle, shake. What you do not get is a person walking across a room, changing outfit, or performing a named dance routine. If that is what you want, the Sexy Dance and Twerk tabs are built for it instead.

One rule before anything else: if the photo is of a real person who is not you, you must have that person’s consent before you animate them. VdoBloom blocks explicit and illegal content outright, and the flexible content tier exists for swimwear, dance and fitness footage — not for making clips of people who never agreed to be in them.

The photo that works best

The keyframe stage is generous but not magic. In practice these traits decide whether the shake lands:

• Full or three-quarter body in frame. The effect needs hips and shoulders visible. A head-and-shoulders selfie gives the model nothing to move.
• Sharp, motion-blur-free original. The keyframe prompt explicitly asks for no motion blur in the plate. Blur in your input becomes smear in the output.
• Uncluttered background. A clean backdrop or a simple studio wall survives the motion pass; a busy street scene will warp behind the subject.
• Even lighting. Hard shadows across the torso confuse the hip geometry and produce wobble in the wrong places.
• Portrait crop for social. Runway Gen-3 supports 16:9, 4:3, 1:1, 3:4 and 9:16 on this tab, so shoot or crop 9:16 if the clip is going to Reels or Shorts.

The four templates and what each prompt sends

Each template is a prepared prompt. You can override it in the prompt box, but the defaults are tuned and are usually the better starting point.

Template	Prompt it sends	Best for
Smooth	smooth body shake, natural jiggle motion, fluid movement, elegant motion, cinematic	The default. Softest, most forgiving on imperfect photos.
Dynamic	dynamic body shake, energetic motion, vibrant movement, powerful motion, cinematic	Higher energy clips cut to a drop or a beat switch.
Natural	natural body shake, realistic motion, authentic movement, natural lighting, cinematic	Lifestyle and fitness footage where the look must stay candid.
Rhythmic	rhythmic body shake, synchronized motion, musical movement, rhythmic lighting, cinematic	Clips you plan to sync to a track with a steady tempo.

What it costs, model by model

Body Shake runs on the native effect roster: Runway, Kling V2.5 Turbo, PixVerse and Vidu. Because it is a keyframe tab, the wider image-to-video roster is not offered here — the keyframe dispatcher only supports these families. Credit prices below are the real numbers from VdoBloom’s credit system, converted at the Lite-plan rate of $15 for 300 credits, so 1 credit is $0.05.

Model	Tier	Credits	Dollar cost	Why pick it
Runway Gen-3	720p, 5s	10	$0.50	Tab default and the cheapest test render. Fits inside the 10 free signup credits.
Runway Gen-3	1080p, 5s	20	$1.00	Same motion, delivery-ready resolution.
Runway Gen-3	1080p, 10s	30	$1.50	Longest Gen-3 option on this tab.
PixVerse v3.5	720p, 5s	18	$0.90	Cheapest PixVerse entry into the fast motion mode.
PixVerse v5	720p, 5s	25	$1.25	The effects specialist; crispest shake dynamics.
PixVerse v5	1080p, 8s	50	$2.50	Longer, higher-resolution hero clip.
Vidu Q2 Turbo	720p, 4s	15	$0.75	Fastest turnaround for bulk drafts.
Vidu Q2 Turbo	1080p, 8s	30	$1.50	Good value at the longer end.
Kling V2.5 Turbo	5s	40	$2.00	Strongest body coherence, no resolution toggle.
Kling V2.5 Turbo	10s	80	$4.00	Only pick this once the shorter test already looks right.

Full spec pages for each of these live at Runway Gen-3, PixVerse v5, Vidu Q2 Turbo and Kling V2.5 Turbo.

The exact steps

1. Open the Body Shake tab. New accounts get 10 free credits with no card, which covers one Runway Gen-3 720p 5-second render exactly.
2. Upload one photo under Upload Photo. Three-quarter or full body, sharp, clean background.
3. Pick a template. Start with Smooth; it is the most forgiving and the same prompt is used as the tab default.
4. Leave the model on Runway Gen-3 for the first pass. Set 720p and 5 seconds.
5. Set the aspect ratio to match the destination — 9:16 for Reels, Shorts and TikTok; 16:9 for YouTube.
6. Generate, then judge two things only: does the face still look like the subject, and does the hip motion read as natural rather than rubbery.
7. If the identity held but the motion was flat, re-run on Dynamic or Rhythmic. If the identity drifted, swap to Kling V2.5 Turbo before you touch the prompt.
8. Only after a 720p pass looks right, re-run the winning combination at 1080p or 8-10 seconds.

Common problems and the actual fix

The face changes mid-clip. Almost always an input problem — small face in frame, or low resolution. Crop tighter so the subject fills more of the plate, or move to Kling V2.5 Turbo, which holds subject coherence best on this tab.

The motion is barely visible. You are probably on Smooth with a model that damps motion. Switch to Dynamic, or to a PixVerse variant, where the tab requests the fast motion mode.

The background melts. Re-shoot or re-crop against a plainer wall. The keyframe stage asks for a clean backdrop, and a cluttered one fights it.

Hands or limbs distort. Shorten the render. A 5-second clip has far fewer frames in which a hand can go wrong than a 10-second one, and the shorter version is also half the credits.

Watermarks, rights and plans

Free renders carry a watermark. Any paid plan downloads watermark-free with commercial rights, starting at $15 a month for Lite and 300 credits — enough for 30 Runway Gen-3 720p body shake clips. Annual billing drops Lite to $10 a month. If you generate in bursts rather than monthly, one-time credit packs start at $2.49 for 75 credits and never expire. The full breakdown is on the pricing page.

Frequently asked questions

How many credits is one body shake video?

10 credits at the tab default of Runway Gen-3, 720p, 5 seconds — $0.50 at the Lite-plan rate. The range across the tab runs from 10 credits up to 80 for Kling V2.5 Turbo at 10 seconds.

Can I use two photos?

No. Body Shake takes exactly one photo. Two-person effects like Couple Dance and Bridal Carry are separate tabs that accept a second upload.

Which model is best for Body Shake?

Start on Runway Gen-3 because it is cheapest for testing. For the final render, PixVerse v5 gives the crispest shake dynamics and Kling V2.5 Turbo gives the most stable body and face. Vidu Q2 Turbo is the value pick at 15 credits for a 720p four-second clip.

Do I need the person’s permission?

Yes. If the photo shows a real person other than yourself, you need their consent before generating. Explicit and illegal content is blocked regardless of consent.

How long can the clip be?

It depends on the model you pick: Runway Gen-3 offers 5 or 10 seconds, PixVerse v5 offers 5 or 8, and Vidu Q2 Turbo offers 4, 5 or 8. Longer clips cost proportionally more credits.

Is there a free way to try it?

Yes — new accounts get 10 free credits with no card, which is exactly one Runway Gen-3 720p five-second render. See the free AI video generator page for what the free tier covers.