Almost every aurora background you can buy is a video file - a loop of a few seconds that repeats for as long as you stream, and viewers do start to notice the seam. Vortexia renders the aurora live in a browser tab instead, so it never repeats and it reacts to whatever you are playing: the curtains of light swell on the bass and settle in the quiet. Open vortexia.live/ambient, choose Aurora, and either add it to OBS as a Browser Source or prop the screen behind you if you stream from a phone. No download, no account, and free at 720p with a small watermark.
How to use Northern Lights, Live Behind You
Open it. Go to vortexia.live/ambient. Nothing to install and no account to create.
Choose Aurora. Step through the looks with the arrows until you reach Aurora, then tap Start so it can hear your music.
Put it on screen. On a computer, copy the viewer URL into OBS as a Browser Source. On a phone, prop the screen behind you.
Tune it. Shift the colour if you want it greener or more violet, and drop the sensitivity if the motion is too eager behind a webcam.
Specs & output
Engine
Chaos Prime
Render Mode
genesis
Iteration Depth
70
Default Zoom
1.40
Colour Shift
150°
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
2026-09-03
Frequently asked questions
Is this an aurora video loop, or is it live?
Live. It is generated frame by frame on your GPU, so there is no loop point and no repeat - a three-hour stream never shows the same frame twice. That is the difference from the video files sold on stock and craft sites, which are typically a few seconds long and cycle for as long as you are on air.
Does the aurora move with my music?
Yes. It listens through your microphone or system audio and separates bass, mid and treble, so the light curtains swell on low end and settle in quiet passages. It also detects the beat, so the motion lands on the kick rather than merely following loudness. A video file cannot do either.
How do I put it behind me on stream?
Two ways. On a computer, add the viewer URL to OBS as a Browser Source at 1920x1080 and drag it below your webcam. On a phone - TikTok LIVE, Instagram Live - open vortexia.live/ambient on a tablet or spare screen and stand in front of it, since those apps accept no external source.
What does it cost to use?
Free at 720p and 30fps with a small Vortexia watermark, and no card is needed. Plus is $4.99/month for 1080p at 60fps with no watermark, and adds Aurora Veil - a second, softer aurora written as its own shader.
About the author
Yousef @ Vortexia — Vortexia Engine Creator.
Yousef builds Vortexia — a browser-based, GPU-accelerated audio-reactive visual engine used by streamers and DJs on Twitch, Kick, YouTube Live and TikTok Live.