How to remove bright streaks that a mask keeps confusing with skin
Tell Vizard Agent where the bright streaks are and, just as importantly, what else in the frame is bright. It then builds the mask against the background behind the streak rather than on brightness alone, and shows you which pixels it would change before it renders anything at all.
What do you type into Vizard Agent?
Put the exclusions in the instruction, not in the follow-up. The difference between a mask that works and a mask that eats an arm is the sentence naming what stays, and Vizard Agent treats it as a constraint to test against rather than a preference. Saying up front that the streaks cross an arm can save a whole failed attempt.
Prompt
What does Vizard Agent actually do?
A white streak is easy to describe and hard to select. Every automatic way of finding it comes down to the bright pixels, and in a shot with hands, faces and paper, most of the bright pixels aren't the streak. So the mask gets rebuilt several times before a single final frame is rendered. In the session behind this article it:
- Sampled frames, measured the streak area across the clip and tested a localised repair, reading the error when the first filter failed to run.
- Tried a tighter mask, reviewed what it changed and checked when the streaks left the frame, so later shots weren't treated.
- Generated candidate brightness masks on representative frames, reviewed which pixels they would change and found skin and paper inside.
- Refined the mask to exclude skin and paper, using the background behind the streak, rather than lowering its strength, then previewed the content-aware repair on samples.
- Rendered and compared the repaired region against the original, tracked the largest patch through the close-up on a coordinate grid, and ran playback checks on the uploaded copy at the exact flagged timestamps.
When does this not work well?
Some bright marks can't be separated from what they cross. If a streak has the same colour and brightness as the skin underneath and no clean background edge, there's nothing for Vizard Agent to build the mask against, and a patch shows as a travelling smudge. Heavy compression, fine detail like hair or text, and very fast motion are hard too.
Common questions
Why does a brightness mask fail here? Because skin and paper are bright too. Vizard Agent uses the background behind the streak instead.
Can I see the mask? Yes. Ask Vizard Agent for the mask on sample frames before any render.
What if the streaks only appear at the start? Vizard Agent checks when they leave the frame and treats only those shots.