What is a set extension in VFX?

A set extension extends the edges of a real set or location with a digital environment — a skyline, landscape, or larger structure — so a small build reads as a full world. It is a core film VFX technique, traditionally done with matte paintings and tracked 3D.

How is this different from traditional CGI set extension?

Traditional set extension needs a modeled 3D environment, camera tracking, projection, and compositing. Here you describe the digital environment in plain language and the model extends your plate, matched to its light and perspective — no 3D build or roto.

What footage works best for a set extension?

A locked-off or slow-moving shot, a clean frame edge to extend from, consistent lighting, and a horizon or eyeline that fixes the perspective. Avoid fast handheld motion so the added world stays locked to your plate.

Can I do a digital set extension on a green-screen shot?

Yes. Extend beyond a partial set or green-screen edge into a full environment; describe what sits past the frame and match it to your foreground's light.

What can I build with it?

City skylines, alien vistas, castle exteriors, mountain ranges, or extended interiors — anything that continues the world past what you actually built or shot.

Set extension & world

Add a digital set extension to your footage

Set extension is the film VFX technique that turns a small build or a bare location into a full world — a city beyond the rooftop, a landscape past the ridge, a structure that was never there. Traditionally that means matte paintings, tracked 3D, and compositing. vfxmagia does the same digital set extension from a description: upload your plate, describe what sits past the frame, and get a CGI environment matched to your footage's lens, perspective, and light.

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Why it works

What you get

Extend a partial build, green-screen edge, or bare location into a full digital environment.
Matte-painting-grade skylines, architecture, and landscapes matched to your plate's lens and light.
Skip the 3D build, camera projection, and roto — describe the extension and render it.
Iterate the world, scale, and time of day across cheap renders instead of one costly comp.

How it works

Three steps

01Upload your plate — a locked-off or slow-moving shot works best — in footage (ref2v) mode.
02Open the Set extension / scale template and describe the digital environment beyond the frame.
03Render, check the blend where your set meets the extension, then download or refine.

Get started

A prompt to start from

“Extend the practical rooftop set into a sprawling digital city — layered skyscrapers, distant mountains, and a hazy horizon — matched to the lens, perspective, and overcast light of the original plate. Photoreal matte-painting quality, cinematic, seamless.”

Use this prompt

FAQ

Questions, answered

What is a set extension in VFX?: A set extension extends the edges of a real set or location with a digital environment — a skyline, landscape, or larger structure — so a small build reads as a full world. It is a core film VFX technique, traditionally done with matte paintings and tracked 3D.
How is this different from traditional CGI set extension?: Traditional set extension needs a modeled 3D environment, camera tracking, projection, and compositing. Here you describe the digital environment in plain language and the model extends your plate, matched to its light and perspective — no 3D build or roto.
What footage works best for a set extension?: A locked-off or slow-moving shot, a clean frame edge to extend from, consistent lighting, and a horizon or eyeline that fixes the perspective. Avoid fast handheld motion so the added world stays locked to your plate.
Can I do a digital set extension on a green-screen shot?: Yes. Extend beyond a partial set or green-screen edge into a full environment; describe what sits past the frame and match it to your foreground's light.
What can I build with it?: City skylines, alien vistas, castle exteriors, mountain ranges, or extended interiors — anything that continues the world past what you actually built or shot.

Keep exploring

From a prompt, no footage

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Ready to make the shot?

Upload your footage, drop in the prompt, and get a rendered VFX clip back in about 5 minutes. You only pay for completed generations.