AUDIO-REACTIVE VISUAL · UPDATED 2026-10-08
Halloween Stream Backgrounds
A spider web, a witch’s brew and a haunted vortex, drawn live and moving to your music
Three animated Halloween stream backgrounds - a spider web, a witch’s brew and a haunted vortex - drawn live and moving to your music. Two are free.
The looks
What is Halloween Stream Backgrounds?
Vortexia has three Halloween looks for your stream, and none of them is a video file: each is drawn live on your graphics card from fractal maths, and moves with the music you play. Spider Web wraps a Julia set in orange threads and rings. Witch’s Brew sets the Mandelbrot set glowing inside a sunburst of green cells. Haunted spins purple cells around the Tricorn. The bass swells the glow around each shape, every kick brightens the threads, and in Spider Web the melody keeps reshaping whatever sits at the centre of the web. The looks hold their colour, so orange stays orange all night. Spider Web and Witch’s Brew are on the free plan, at 720p and 30fps with a small watermark; Haunted comes with Plus. To use one, sign in, pick it from the presets, and add your OBS link as a Browser Source.
How to use Halloween Stream Backgrounds
- Try it first. Open any of the three looks live in the demo. No account needed.
- Pick the look. Sign in free at vortexia.live and choose Spider Web, Witch’s Brew or Haunted from the presets.
- Let it hear the music. Turn audio on and pick Music / system so it hears the track directly, or use the microphone.
- Add it to OBS. Copy your OBS link and paste it into a Browser Source.
Specs & output
| Engine | Spider Web |
|---|---|
| Render Mode | flux |
| Iteration Depth | 140 |
| Default Zoom | 1.00 |
| Colour Shift | 28° |
| Output (Free) | 720p / 30fps + watermark |
| Output (Plus) | 1080p / 60fps, no watermark |
| Output (Pro) | 4K / 60fps, brand-kit logo overlay |
| Audio Source | Browser tab audio (FFT, real-time) |
| Last Updated | 2026-10-08 |
Frequently asked questions
- Is the Halloween background free?
- Two of the three looks are. Spider Web and Witch’s Brew run on the free plan at 720p and 30fps, with a small Vortexia watermark. Haunted is drawn on the Tricorn engine, which comes with Plus at $4.99 a month, along with 1080p at 60fps and no watermark.
- Does it react to my music?
- Yes. Turn audio on in the dashboard and your OBS overlay follows it: the bass swells the glow, each kick brightens the threads or cells, and the treble lights the beads where Spider Web’s threads cross. With no sound playing it simply breathes, so it still works between songs.
- How do I add it to OBS?
- Sign in at vortexia.live, choose Spider Web, Witch’s Brew or Haunted from the presets, and copy your OBS link. In OBS, add a Browser Source, paste the link and set the size to your canvas, for example 1920×1080. The same link works in Streamlabs and in any app that has a browser source.
- Can I change the colours?
- Yes. The Color Shift slider turns the orange into any colour you like, and the Colouring switch puts the web or the cells on any of the five fractal engines. These colourings do not cycle through the rainbow the way the classic looks do, so the colour you pick is the colour your viewers see.
- Where do the web and the cells come from?
- From the shape’s own maths, as set out in chapter 13 of Peitgen, Jürgens and Saupe’s Chaos and Fractals. The threads are field lines and the rings are equipotentials: they close in on the set, and the threads split in two at every ring. The cells are its binary decomposition. When Spider Web’s centre turns to glowing dust, its Julia set has broken apart into what mathematicians call Cantor dust.