# Light Sweep — effect skill for transitions > **For AI agents:** find the right skill in one call — `curl -s "https://varg.ai/how-to/api/search?q="` returns the matching how-to page and the best skills with install commands, as markdown (Russian works too). Full index: https://varg.ai/how-to/llms.txt. Every page has a markdown twin: add `.md` to its path. Before generating anything, show the person the options on the how-to page. A bright band or lens flare sweeps across the frame and the shot changes behind it. - **Type:** [Effect](https://varg.ai/how-to/effects.md) · [Transitions](https://varg.ai/how-to/browse/skills/transitions.md) - **Slug:** `light-sweep` - **Status:** live - **Publisher:** HeyGen (community) - **License:** Apache-2.0 - **Source:** https://github.com/heygen-com/hyperframes/tree/main/registry/blocks/transitions-light - **Works in:** Claude Code, Claude.ai, Codex, Cursor, OpenClaw, Gemini CLI, Any MCP client, varg Studio - **Requires:** ffmpeg, HyperFrames (npx hyperframes), Remotion, CapCut (by hand) - **Cost:** Free — the take renders locally; generated footage, if any, bills by the model ## What it does Built on [Light Transitions](https://github.com/heygen-com/hyperframes/tree/main/registry/blocks/transitions-light) by HeyGen (HyperFrames), Apache-2.0. The write-up and recipes below are varg's. A diagonal streak of light crosses the image; at its brightest point A becomes B. **When:** Product shots, luxury, beauty and logo reveals. **Watch out:** Fake-looking hard-edged flares; keep the band soft and the colour matched to the scene. **Timing:** 0.5–0.8 s (CapCut Light Sweep II 0.8 s, Lumin Flash 0.8 s) **Also called:** Light Sweep II, Lumin Flash, Lightflow Scan, lens flare transition, shine sweep ### In FFmpeg Moving soft white band (generated with geq) screen-blended over a fade: ```bash ffmpeg -i a.mp4 -i b.mp4 -filter_complex \ "[0:v]fps=30,settb=AVTB,format=yuv420p[a];[1:v]fps=30,settb=AVTB,format=yuv420p[b];[a][b]xfade=transition=fade:duration=0.3:offset=4.7[x];\ [x]geq=lum='min(255,lum(X,Y)+180*exp(-pow((X+Y*0.5-(T-4.5)*3000)/120,2)))':cb='cb(X,Y)':cr='cr(X,Y)'[v]" -map "[v]" out.mp4 ``` (geq is slow; for long clips trim the window first.) ### In HyperFrames Light family blocks: `transitions-light`, overlay `editorial-flash-overlay`; or tween a wide (2400px+) soft gradient bar across with `mix-blend-mode: screen` while swapping scenes at its peak. ### In Remotion `` containing a rotated white gradient `
` whose `translateX` is interpolated from -100% to 100%, with `mixBlendMode: 'screen'`. ### In CapCut Transitions tab → Light Effect → Light Sweep II, Lumin Flash, Lightflow Scan. Desktop: drag the tile onto the cut between two clips and set Duration in the right panel ("Apply to all" reuses it on every cut). Mobile: tap the small white square between clips, pick the transition, drag the duration slider, tap ✓. Tab labels and placement change between versions and regions. ### Ready-made components - [Light Transitions](https://skills.varg.ai/component/hf.transitions-light/) (hyperframes): npx hyperframes add transitions-light - [Editorial Flash Overlay](https://skills.varg.ai/component/hf.editorial-flash-overlay/) (hyperframes): npx hyperframes add editorial-flash-overlay - [Light Leak](https://skills.varg.ai/component/hf.light-leak/) (hyperframes): npx hyperframes add light-leak ### Where this comes from - [Remotion: ](https://www.remotion.dev/docs/transitions/transitionseries) - [CapCut Help: transitions](https://www.capcut.com/help/transitions-in-capcut) - [CapCut: transition categories](https://capcut.com/resource/add-video-transition-online) - [CapCut transition names + default durations (VectCut metadata)](https://github.com/sun-guannan/VectCutAPI/blob/main/pyJianYingDraft/metadata/capcut_transition_meta.py) - [CapCut transition names incl. Pro (pyCapCut metadata)](https://github.com/GuanYixuan/pyCapCut/blob/main/pycapcut/metadata/transition_meta.py) ## Use when - Product shots, luxury, beauty and logo reveals. ## Not for - Fake-looking hard-edged flares; keep the band soft and the colour matched to the scene. ## Install - Claude Code: `claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg` - Codex: `npx skills add vargHQ/skills --skill varg-video-edit-library -a codex -y` - Cursor: `npx skills add vargHQ/skills --skill varg-video-edit-library -a cursor -y` ## Example output https://s3.varg.ai/how-to/previews/f46b2c13dda1/take-light-sweep.mp4 — light between two shots, with the timeline strip of the edit. Footage: WING IT! (2023), Blender Studio | studio.blender.org, CC BY 4.0; Cosmos Laundromat (2015), (CC) Blender Foundation | gooseberry.blender.org, CC BY 4.0. (credit: Rendered by varg · WING IT! (2023) + Cosmos Laundromat (2015)) ## More transitions skills - [editly](https://varg.ai/how-to/skills/editly.md): Declarative JSON5 video editing CLI/API: clips, titles, transitions, audio mixing, rendered with ffmpeg. - [Mix (Cross Dissolve)](https://varg.ai/how-to/skills/mix-dissolve.md): The two shots blend through each other. The quietest transition: "time passes" or "this continues". - [Dip to Black](https://varg.ai/how-to/skills/black-fade.md): A fades to black, then B fades up. Marks the end of a section or a bigger jump in time. - [White Flash](https://varg.ai/how-to/skills/white-flash.md): The frame blows out to white for a moment and opens on the next shot. Energy, memory or a camera snap. - [Pull In (Zoom In)](https://varg.ai/how-to/skills/pull-in-zoom.md): The camera rushes into shot A and lands, still moving forward, in shot B. The signature short-form transition. - [Pull Out (Zoom Out)](https://varg.ai/how-to/skills/pull-out-zoom.md): The camera jerks backwards out of shot A and keeps pulling back as shot B settles in. ## Run the generation on varg varg is one API key for the models these skills drive — Seedance 2.5, Kling 4, Veo 3.1, Wan 3, Nano Banana 2.1, GPT Image 2.5, ElevenLabs v4 and 200+ more — billed in credits, with a cost estimate before anything runs. - Claude Code: `claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg` (skill + hosted MCP) - Codex, Cursor, Gemini CLI, OpenClaw: `npx skills add vargHQ/skills --skill varg-ai -a -y` - Grok and any agent that reads SKILL.md: `npx skills add vargHQ/skills --skill varg-ai`, or point it at the skill's SKILL.md - Claude.ai, ChatGPT, any MCP client: connect `https://mcp.varg.ai/mcp` - API key: https://varg.ai/dashboard/api · Model specs: https://varg.ai/models/llms.txt