# Ink and Brush Reveal — 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. An organic ink blot, brush stroke or smoke plume spreads over A and B shows through the painted area. - **Type:** [Effect](https://varg.ai/how-to/effects.md) · [Transitions](https://varg.ai/how-to/browse/skills/transitions.md) - **Slug:** `ink-brush` - **Status:** live - **Publisher:** HeyGen (community) - **License:** Apache-2.0 - **Source:** https://github.com/heygen-com/hyperframes/tree/main/registry/blocks/hw-scribble-transition - **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 [Scribble Transition](https://github.com/heygen-com/hyperframes/tree/main/registry/blocks/hw-scribble-transition) by HeyGen (HyperFrames), Apache-2.0. The write-up and recipes below are varg's. Irregular, hand-made edges bloom across the frame, unlike geometric wipes. **When:** Art, travel, food, Asian-inspired themes, creative portfolios. **Watch out:** Tech and data content; low-resolution matte assets with visible pixel edges. **Timing:** 0.5–2.0 s (CapCut White Ink 0.47 s, Reveal Brush 2.0 s) **Also called:** White Ink, Reveal Brush, ink transition, brush stroke transition, paint reveal, Black smoke, White smoke ### In FFmpeg Use an ink/brush matte video (white paint on black) as the mask: ```bash ffmpeg -i a.mp4 -i b.mp4 -i ink_matte.mp4 -filter_complex \ "[0:v]fps=30,settb=AVTB,format=yuv420p,scale=1280:720[a];[1:v]fps=30,settb=AVTB,format=yuv420p,scale=1280:720[b];\ [2:v]fps=30,settb=AVTB,format=yuv420p,scale=1280:720,format=gray,format=yuv420p[m];\ [a][b][m]maskedmerge[v]" -map "[v]" out.mp4 ``` (maskedmerge shows B where the matte is white; align the matte's start with `setpts=PTS-STARTPTS+/TB` and pad with black.) ### In HyperFrames `npx hyperframes add hw-scribble-transition` (scribble bands cover the frame, the host cuts beneath, then clear); smoke-like organic: `domain-warp-dissolve`. ### In Remotion `glTransition({name: 'luma', textures: {luma: staticFile('brush.png')}})` animates a luma matte image (1.x name `luma`, 2.0 `LumaWipe`); or a custom presentation using a matte `