Segment the person
The foreground video is analyzed to isolate the body shape from the frame.
EFFECT / GRID REVEAL
AI Grid Reveal Video Effect
Turn a person mask into animated grid cells. The subject appears only inside the squares touched by their body, while the rest of the frame keeps your background video.
Human mask → grid cells9 x 12
RUN THE EFFECT
Test the grid reveal API with hosted video URLs.
This first version accepts public MP4 links. Uploads will come later; for now, paste a person clip and a background clip that Replicate can fetch.
HOW IT WORKS
A segmentation mask, but made graphic.
The creative trick is not a soft cutout. It is a hard grid decision: if the person touches a square, the whole square becomes foreground.
Snap mask to cells
Touched pixels are converted into whole grid squares, creating a crisp tile silhouette.
Composite two videos
Person cells reveal the foreground clip while every other cell keeps the background.
Render the result
Grid lines and settings are applied consistently across the sequence.
Built as a preset, exposed as an endpoint.
This page is the first effect template: a public landing page, a runnable form, an app API route, a Replicate model, and reusable launch rules for the next presets.
USE CASES
Where this effect fits.
Social edits
Make a person cut through background footage with a tile-by-tile reveal that reads instantly on mobile.
Music videos
Place a performer over texture, ocean, city, or abstract plates without using a normal soft mask.
Fashion clips
Reveal looks, silhouettes, and walking shots in a graphic grid system that feels editorial.
Campaign tests
Prototype a recognizable motion treatment before committing to a full post-production pass.
API products
Expose the preset as a repeatable video effect inside your own app, queue, or creative automation flow.
Creator packs
Turn one visual rule into reusable settings for different grid densities and mask expansion styles.
EXAMPLES
Three starting directions.
Balanced
9 columns, 12 rows, slightly expanded mask for a clean body silhouette.
Fine Grid
More cells for a detailed reveal that keeps the person shape more readable.
Chunky
Larger squares and more mask expansion for a louder editorial look.
Call the effect from your app.
The public route sends jobs to the server-side endpoint, which keeps provider tokens private and returns a prediction id for polling.
POST /api/effects/grid-reveal
{
"personVideoUrl": "https://...",
"backgroundVideoUrl": "https://...",
"columns": 9,
"rows": 12
}FAQ
Questions before you render.
What is the grid reveal video effect?+
It is a video effect that segments a person, maps the mask to a grid, and reveals the person video only in grid cells touched by the body. The remaining cells show the background video.
Do I need to upload files?+
This first public version accepts hosted MP4 URLs. A direct upload flow is the next layer to add once storage is wired into the app.
Can I use this through an API?+
Yes. The page calls the BLXSSXM app endpoint at /api/effects/grid-reveal, which proxies the Replicate model and returns a prediction id and output URL.
Why does segmentation sometimes miss edges?+
The effect depends on human segmentation. The mask expansion setting helps grab more grid cells around the body, but very low contrast or unusual poses can still reduce accuracy.
Is this production-ready?+
It is an early preset endpoint. It is useful for testing, demos, and internal workflows, but upload handling, GPU scaling, and queue UX should be hardened before high-volume use.