AI Person Replace — locally, on your GPU

Person-focused isolation and swap

Portrait cutout

Isolate people with edge quality tuned for hair and motion — preview before you commit.

Replacement-oriented compositing

Swap or composite the isolated subject against a new plate or backdrop in-suite.

Works with background tools

Related modules cover broader smart cutout and object segmentation when the subject is not a person.

Person replace without a studio

Studio green screens are optional for many portrait jobs, but motion, occlusion, and low edge contrast still set the ceiling. KwaFlux keeps the workflow local so NDA interviews and unreleased talent footage do not enter an upload queue.

Use object segmentation when the subject is not a person; person-focused flows optimize for portraits and body mattes.

Preview edges before a full render

Hair against busy backgrounds and fast turns remain hard for any cutout system. Free short previews exist so you can inspect crawling edges on the real clip before a long export.

How to run person replace in KwaFlux

1. 01

   Import the portrait clip

   Ordinary lighting is fine; extreme motion blur and heavy occlusion are the honest hard cases.

2. 02

   Cut out and preview

   Run portrait cutout, then check a 1s/3s/5s preview on hairlines and hands.

3. 03

   Composite or export

   Swap the plate / backdrop in-app or export the matte for your editor — all locally.

System requirements

Operating system

Windows 10 (64-bit, 1809+) or Windows 11

macOS build coming — planned minimum macOS 13 or newer (Apple Silicon and Intel).

GPU

DirectX 12 compatible discrete GPU (NVIDIA / AMD / Intel Arc)

NVIDIA RTX recommended — TensorRT acceleration is available on RTX. macOS GPU requirements will ship with the Mac build.

Memory

16 GB RAM or above

Keeps previews and export staging responsive under load.

Storage

Fast SSD workspace

Better for caching, temp artifacts, and larger preview sessions.

Windows 10 (64-bit, 1809+) or Windows 11 today; macOS coming — planned minimum macOS 13+.

Frequently Asked Questions

What is person replace?

It means isolating a person (or subject) in a clip and swapping or compositing against a new backdrop or plate. Quality depends on motion, occlusion, and edge contrast.

Is a green screen required?

No. The desktop suite includes AI cutout paths designed to work without a studio backdrop, though clean lighting still helps.

Can I select non-person objects?

Object segmentation covers arbitrary subjects in supported modules. Person-focused flows optimize for portraits; use object tools when the subject is not a person.

Does processing stay private?

Jobs run locally. KwaFlux does not upload your media to finish these enhancement previews or exports.

Can I try it before buying?

Yes. Download KwaFlux and render 1-, 3-, and 5-second effect previews across all AI modules without creating an account. You only sign in and pick a paid plan when you want to export or convert, and there is a $199.99 Perpetual License if you prefer to skip subscriptions.