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Generative Backgrounds & Shaders for Video (Light Leaks Too)

Some of the best-looking video has no footage in it at all — just animated, generative backgrounds rendered in real time. Here’s how to use shaders, generative backdrops and light leaks on your phone to add atmosphere behind text or as standalone B-roll.

Open almost any polished title sequence and you’ll find motion with no camera footage in it — just animated, generative visuals rendered in real time. Shaders, generative backgrounds and light leaks are the atmosphere layer of video, and they’re some of the highest-impact, lowest-effort effects you can add.

What “generative” means

A generative background is created by code, not a camera. A shader program draws flowing color and motion every frame — aurora gradients, drifting nebula, rain running down glass. The advantages are big:

  • No footage or licensing — it’s generated, not stock.
  • Loops forever — no visible seam, any length.
  • Scales to any resolution — it’s math, not pixels, so it’s always crisp.

They make ideal backdrops behind text and logos, or standalone B-roll between scenes.

The Shader Effects panel in the ExpoCut mobile video editor with live animated background previews Browse by mood — Fluid, Fire, Light, Cosmic, Geometric
The Shader Effects picker — dozens of procedural backgrounds, each a live GPU preview of the real animation. Browse by mood (Fluid, Fire, Light, Cosmic, Geometric, Retro), tap one, and it drops in as an animated layer that loops forever and stays crisp at any resolution.

Three ways to use them

Use How
Behind text Generative background on the bottom layer, animated title on top
As B-roll A few seconds of shader between talking-head clips
As an overlay Light leaks / bokeh on a layer above footage, blended in

Light leaks & overlays — organic warmth

Light leaks are warm flares laid over your footage. The trick is the blend mode: set the overlay to Screen (or Add) so its dark areas vanish and only the bright flare shows through. Dial opacity to taste. Leaks add film-like warmth and conveniently hide hard cuts.

The Light Leak preset picker in the ExpoCut mobile video editor with warm and neon flare presets Pick a flare — warm sunsets, cool windows, neon bokeh
The Light Leak picker — 18 presets from Warm Sunset and Mango Sun to Neon Magenta and Prism Rainbow. Add one on a layer above your footage, set the blend to Screen, and only the bright flare shows through for instant film-like warmth.

Atmosphere, not distraction. Generative effects are gorgeous, which makes them easy to overuse. Behind text they should support the words, not compete. Keep motion gentle and contrast moderate so your message stays readable.

A recipe: a title over a living background

  1. Add a generative background

    Drop an aurora or nebula shader on the bottom layer.

  2. Add your title on top

    An animated text layer above it — see add text & titles.

  3. Balance it

    Lower the background’s brightness or contrast slightly so the text stays crisp, and keep the shader motion slow.

Where to go next

Generative backgrounds give you studio-grade motion graphics with no footage and no licensing — just code, rendered live. Start with a title over an aurora and you’ll never go back to plain black.


Frequently asked questions

What is a generative background in video?

A generative background is animated visuals created by code in real time — flowing aurora gradients, drifting nebula, rain on glass — rather than recorded footage. They make perfect, endlessly-loopable backdrops behind text and logos, and never need licensing or stock footage.

How do I add a light leak to a video?

Add a light-leak overlay on a layer above your footage and set its blend mode (like Screen) so the dark parts disappear and only the warm flare shows. Adjust opacity to taste. Light leaks add organic warmth and hide hard cuts.

Do shaders slow down my phone?

Modern mobile editors render shaders efficiently on the GPU, on-device, in real time. You get a live preview while editing, and they bake into the export at full quality without uploading anything.

Add a generative backdrop

Aurora, nebula, rain-on-glass and light leaks — rendered live on-device, perfect behind text or as standalone B-roll.

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