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Luma Wipe

Luma Wipe · screenshot coming soon

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What this node does

Luma Wipe blends video_a into video_b by sweeping a threshold across a grayscale luma pattern: dark areas of the map reveal first, bright areas last (or the reverse). Pick one of the built-in patterns (radial, clock, blinds, spiral, cloud, and more) or wire your own grayscale luma_image. A softness control feathers the wipe edge. It runs on ▶ Run. Both video_a and video_b are required COMFYTV_VIDEO inputs. If no luma_image is connected, the node generates the chosen luma_map at video_a’s resolution. Output is COMFYTV_VIDEO. To hand the result to a native ComfyUI node, insert a Bridge (ComfyTV/Bridge). See https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md.

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When to use it

  • A shaped reveal between two shots (radial iris, clock wipe, blinds, etc.).
  • A custom transition driven by your own grayscale artwork.
  • A softer, more stylized alternative to a straight crossfade or hard cut.

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Parameters

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luma_map

The built-in grayscale pattern that drives the wipe order. Options: none plus linear_x, linear_y, bilinear_x, bilinear_y, radial, square, diamond, clock, symmetric_clock, spiral, burst, curtain, blinds_h, blinds_v, checker, cloud. Default radial. Ignored if you wire a luma_image; if set to none you must provide a luma_image.

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duration

Transition length in seconds, 0.1–5.0, step 0.05, default 1.0.

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softness

Feathering of the wipe edge, 0.0–1.0, default 0.1. 0 = a hard edge, higher = a softer, more gradual blend.

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invert

Boolean, default off. Reverses the wipe direction (bright areas reveal first instead of dark).

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video_a / video_b (inputs)

The outgoing (video_a) and incoming (video_b) COMFYTV_VIDEO clips. Both required.

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luma_image (input, optional)

Your own grayscale COMFYTV_IMAGE to use as the wipe pattern instead of a built-in luma_map.

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Outputs

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Tips

  • A wired luma_image overrides luma_map. If you set luma_map to none without supplying an image, the node stops and asks for one.
  • Higher softness hides seams in a hand-drawn map; 0 keeps a crisp, graphic edge.
  • Video Transition — ffmpeg xfade transitions (fades, slides, wipes) between two clips.
  • Sequence — assemble multiple clips with transitions in one node.