---
title: "Reaction-Diffusion on Selfie Video — Webcam RD | TekDetek"
description: "Run reaction-diffusion on a selfie clip in TekDetek. Free to try and edit. Pro for clean unlimited export. Live RD maze GIF."
url: "https://vikmil.com/tekdetek-note-reaction-diffusion-selfie.html"
---

# Reaction-diffusion on selfie video

Open [TekDetek](https://vikmil.com/tekdetek/), swipe a reaction-diffusion phone look (start with **phone-rd-spots**), face the light, record. The field seeds from motion in frame.
TekDetek is not completely free. This workflow is free to try and edit. A free record is watermarked and 20 seconds. [Pro](https://tekdetek.gumroad.com/l/xkljia) is clean and unlimited.

## Free vs Pro

Free: open the app, swipe and edit looks (phone reaction-diffusion and cellular automata included), luma detection, Hand, watermarked MP4 or PNG up to 20 seconds, watermarked OBS up to 5 minutes (restart anytime).

Pro: clean export with no watermark, unlimited record and OBS, full preset library, Shuffle, Depth and Alt ASCII, add RD / CA / PreText / GEO 3D / Sonify on the desktop graph, higher detection caps. TekDetek is not completely free.

[Open TekDetek](https://vikmil.com/tekdetek/) · [Buy Pro](https://tekdetek.gumroad.com/l/xkljia)

![phone-rd-spots — reaction-diffusion spots on a clip](https://vikmil.com/assets/seo-presets/rd-spots.gif)

_Look: **phone-rd-spots**. Start here, then EDIT if the field dies or floods._

## Settings that survive a selfie

Front camera plus side light keeps contrast in the seed. If the pattern flatlines, move into frame or lower the timestep in EDIT.
Full map: [reaction-diffusion guide](https://vikmil.com/tekdetek-reaction-diffusion.html) · [RD node](https://vikmil.com/tekdetek-nodes.html#rd).

## FAQ

### What is free?

Open the app in a browser, swipe and edit looks (phone reaction-diffusion and cellular automata included), luma detection, Hand, watermarked MP4 or PNG up to 20 seconds, and watermarked OBS up to 5 minutes (restart anytime).

### What requires Pro?

Clean export with no watermark, unlimited record and OBS, the full preset library, Shuffle, Depth and Alt ASCII, adding RD / CA / PreText / GEO 3D / Sonify on the desktop graph, and higher detection caps. TekDetek is not completely free.

## More tools

- [ASCII video tool](https://vikmil.com/tekdetek-ascii-vj.html)
- [ASCII webcam filter](https://vikmil.com/tekdetek-ascii-webcam-filter.html)
- [ASCII filter for OBS](https://vikmil.com/tekdetek-obs-ascii-filter.html)
- [Browser VJ tool](https://vikmil.com/tekdetek-vj-tool.html)
- [Reaction-diffusion](https://vikmil.com/tekdetek-reaction-diffusion.html)
- [Cellular automata](https://vikmil.com/tekdetek-cellular-automata.html)
- [Nodes](https://vikmil.com/tekdetek-nodes.html)
- [Guide](https://vikmil.com/tekdetek-guide.html)