How to make your subject stand out from the background
Upload the clip and tell Vizard Agent the subject should sit further forward than the background. Vizard Agent samples the footage, builds a matte that separates the two, tests it on one frame before committing, and verifies the colour survives the composite rather than assuming it did.
What do you type into Vizard Agent?
Describe the result rather than the technique. Vizard Agent picks the method from what you describe, whether that's a matte, selective treatment or a depth-style separation. "Make the foreground stand out and feel further from the background" is a complete brief. Saying the colours must stay as they are is worth adding, so the separation doesn't desaturate anything.
Prompt
What does Vizard Agent actually do?
Footage shot on a phone is flat: the subject and the background sit at the same apparent distance, so nothing draws the eye. Separating them is a compositing job. Build a matte, treat the two layers differently, put them back together, then check the colour survived. In the session behind this article it:
- Checked the clip's duration, size and format, sampled it at several moments and looked at the frames to decide how strongly to separate subject and background.
- Tested a matte on one representative frame rather than the whole clip.
- Read the exact filter error when the test failed and found the real cause: the split filter needed an explicit output count. It switched to clearer stream labels and divided the stream into three branches.
- Checked the mask for gaps and reviewed the composite, which worked but had quietly turned the picture grey.
- Traced which branch was becoming greyscale, switched to a colour-preserving composite and verified it with channel averages instead of trusting the preview.
When does this not work well?
Separating a subject from a background that was never actually separate is an estimation, and some footage gives Vizard Agent very little to go on. Similar tones defeat the matte, since a dark coat against a dark wall has no edge. Hair, loose fabric and motion blur are where mattes fail. Overdone, it looks cut out. And it enhances a difference; it can't create one.
Common questions
Do I need a green screen? No. Vizard Agent builds the separation out of ordinary footage.
Will it change the colours? It shouldn't. Vizard Agent verifies the colour survived rather than trusting the preview.
Why measure the channels instead of just looking? Because a working effect and a broken composite can both look mildly desaturated. Channel averages tell Vizard Agent which one it has.