August 25

MiniMax H3 AI Model Swap: Replace Fashion Models with XL–XXXL Models in Video

Learn how to use MiniMax H3 to replace a fashion video character with an XL–XXXL model reference while retaining the source clip’s movement, framing, and scene flow.

Models AI Video Generation E-commerce MiniMax-H3 AI model swap fashion video plus-size models character replacement

Video Character Replacement Workflow

One fashion clip can support more than one model presentation. With a source video and an XL–XXXL character reference, MiniMax H3 can generate a new version in which the original character is replaced by a plus-size model while the source clip guides the performance, framing, and scene flow.

A practical workflow for fashion brands, ecommerce teams, and creators exploring more inclusive campaign concepts without reshooting the initial idea.

INPUT · SOURCE VIDEO

Source video
Provides the original posing, movement, camera framing, handbag interaction, and indoor scene.

OUTPUT · AI MODEL SWAP

AI-generated result
Replaces the on-screen character with the supplied XL–XXXL reference model.

What You Need for a Plus-Size AI Model Swap

01 · MOTION SOURCE

One fashion video

Use a clip with one clearly visible person and the movement, framing, and scene you want to retain.

02 · CHARACTER SOURCE

One XL–XXXL model image

Use a clear, full-body reference that defines the target appearance and body proportions.

The source video supplies the motion and composition. In this example, the model adjusts her sunglasses, holds a handbag, and changes poses inside a bright dressing room.

The target reference shows the plus-size model from the front, side, and back. These views give MiniMax H3 more visual information about her face, hairstyle, silhouette, and body proportions than a face-only portrait would provide.

XL–XXXL fashion model reference shown from the front, side, and back — **Character reference.** The three-view image supplies the target model’s appearance and full-body proportions.

Step 1: Upload the Source Fashion Video

Open MiniMax H3 on WeShop AI and upload the fashion clip as video 1.

Choose a source in which the main character remains easy to see. Heavy occlusion, fast cuts, or multiple people can make it harder to maintain a consistent replacement. The source clip should already contain the movement, shot composition, and scene you want to reuse.

Step 2: Upload the XL–XXXL Model Reference

Upload the three-view model image as image 1. This tells MiniMax H3 which character should replace the person in the video.

For a body-type change, use a full-body reference rather than only a headshot. A strong reference should have:

a clearly visible face;
an unobstructed full-body view;
readable body proportions;
a simple background;
no additional people.

When available, front, side, and back views provide useful information for turns and pose changes. Keep all views visually consistent so the model is not asked to combine conflicting identities or proportions.

Step 3: Enter the MiniMax H3 Character-Replacement Prompt

Use this concise prompt:

COPY-READY PROMPT

Replace the character in the video @{video 1} with image @{image 1}

The asset references perform two different jobs:

@{video 1} identifies the video whose character will be changed.
@{image 1} identifies the target XL–XXXL model.

Because the source video already contains the action and camera information, the prompt can stay focused on the character replacement. Add extra instructions only when you have a specific element that must change or remain stable.

MiniMax H3 upload interface showing the source video, model reference, replacement prompt, and generated result — **Generation setup.** The source clip and XL–XXXL character image are connected through one direct replacement instruction.

Step 4: Generate and Review the XL–XXXL Fashion Video

Run the generation, then review the result at normal speed and frame by frame around difficult movements.

Character continuityCheck the face, hairstyle, silhouette, and XL–XXXL body shape throughout the clip.

Motion continuityInspect the sunglasses gesture, pose changes, handbag position, and full-body movement.

Edge qualityLook closely at hands, hair, clothing boundaries, and overlapping limbs or accessories.

You can try it directly using the tool on the right.

Important for ecommerce useThis is a visual character-replacement workflow, not a technical fit simulation. Do not present the output as proof of how a garment fits at a real XL, XXL, or XXXL size. Review anatomy, clothing details, and product representation before publishing.

Turn One Fashion Concept into a More Inclusive Visual

An existing fashion clip no longer has to remain tied to a single model presentation. With one authorized video, a clear full-body reference, and a direct prompt, MiniMax H3 gives creative teams a practical way to explore an XL–XXXL version of the same visual idea.

Use only source videos and character images you have permission to edit, and disclose AI-generated media where appropriate.

MiniMax H3 on WeShop AI

Create Your Plus-Size AI Fashion Video

Replace the character in an authorized fashion clip with your XL–XXXL model reference.

Try MiniMax H3 →

You can try it directly using the tool on the right.