How to put your subject on a green screen for someone else to use
Upload the clip and tell Vizard Agent you want the subject on a green screen rather than in a new scene. Vizard Agent removes the original background, verifies the transparency actually survived, keys the subject cleanly onto green, checks the hair and moving limbs, and hands you an asset anyone can composite.
What do you type into Vizard Agent?
Ask for the green screen rather than a scene. Otherwise Vizard Agent composites the subject into a background it picks for you, which is a different and far less reusable deliverable than a keyable plate somebody can drop anywhere. Say whether the original audio comes with it, and ask for blue if the subject wears green.
Prompt
What does Vizard Agent actually do?
A file with the background removed but no alpha channel looks fine in a preview and is useless to whoever has to key it. So Vizard Agent verifies the output rather than assuming it worked, and keeps going until the transparency is real and the edges hold through the movement. In the session behind this article it:
- Inspected the clip, sampled frames and reviewed a contact sheet to judge how separable the subject was.
- Removed the room background and reviewed a green-screen composite across the whole clip.
- Found the output had no real transparent channel, read the removal log to see why, and checked the returned file directly.
- Re-ran the removal in a format that keeps an alpha channel and verified the transparency this time.
- Fell back to a local matting tool when the service still fell short, and checked the hair, clothing and moving limbs on the isolated subject.
- Restored the original audio and exported a 7.43-second vertical file at 720x1280, H.264, 30fps, with AAC audio.
When does this not work well?
A keyable plate is harder than a finished composite, because every flaw a chosen background would have hidden becomes someone else's problem. Loose strands of fine hair are where keys fail, fast limbs smear across the edge, green clothing disappears, and reflections and shadows carry the old background's colour. Some services also drop the alpha, so the output has to be verified.
Common questions
Can I have transparency instead of green? Yes, where the format supports it. Vizard Agent verifies the alpha actually survived.
Does it need a green screen to start with? No. Vizard Agent separates the subject from an ordinary room background.
What if my subject wears green? Ask for blue instead. Vizard Agent keys to whichever colour you name.