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Use this resource to darken the edges of a video for a cinematic look
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In a terminal, from the folder you want:
npx --yes palatekit@latest install edge-darkening-vignetteFirst time: connect the CLI with
npx --yes palatekit@latest loginThe agent pastes into your HyperFrames composition an image-free radial gradient overlay that covers the whole scene without getting in the way. You set the edge color, the size of the clear center and the shape (ellipse or circle). You get a more cinematic result, ready to sit under a film grain.
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Updated November 2, 2026
You say
"Add a dark vignette to my composition, stronger at the edges, in an ellipse shape."

Composition published by HeyGen (HyperFrames) under the Apache-2.0 license, resource page and guide written by PalateKit.
Modified by PalateKit
Version modifiée de « Vignette » (HeyGen (HyperFrames), Apache-2.0) : traduction française et fiche par PalateKit.
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Yes: the composition renders to video with HyperFrames (Node.js). The agent can install it and run the render.
Yes, they live in the HTML file. Give the agent your texts and palette.