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Atmosphere Background

Meng ToCommunityCreated by Meng To

  • Skill
  • Content generator
  • Design and creative
  • MIT
  • No issues found
Download ZIP

From the author

Create a dark atmospheric background with drifting vertical light folds, screen-blended glow, and a concentrated luminous corner or lower-edge bloom.
— the description by Meng To

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The Atmosphere Background skill provides a structured approach to creating moody, immersive backdrops for digital interfaces. It focuses on generating deep, near-black environments characterized by soft, overlapping vertical light folds that mimic the appearance of fog or illuminated fabric. By utilizing additive blending and controlled motion, the skill ensures the background remains a sophisticated, non-distracting element that enhances the overall visual depth of a design.

What it does

  • Generates dark, near-black backgrounds with layered vertical light folds.
  • Applies screen or additive blending to create natural brightness accumulation.
  • Focuses luminous intensity toward specific corners or edges for a cinematic effect.
  • Provides guidance on using canvas or shader-driven rendering for fluid, slow-motion drift.
  • Ensures color palettes remain restrained and aligned with brand accents.

When to use it

  • When you need a premium, moody backdrop for an immersive interface.
  • When the design requires fluid, atmospheric motion rather than static gradients.
  • When you want to establish a focal point of light without overwhelming foreground content.
  • When creating a cinematic atmosphere using subtle, meditative light movement.

Advantages

  • Creates a sense of depth and spatial layering in digital backgrounds.
  • Maintains a calm, professional aesthetic through slow, controlled motion.
  • Prevents visual clutter by avoiding hard edges and noisy patterns.
  • Highly customizable through fold density, drift speed, and focal point placement.

Usage examples

“Create a dark atmospheric background for a premium tech landing page using a deep charcoal base and subtle violet light folds.”
The agent generates a canvas-based background with slow-drifting violet vertical folds that accumulate light toward the bottom-right corner.
“Design a moody backdrop for a music app that uses a dark navy base and a concentrated glow in the lower-left corner.”
The agent produces a shader-driven background with soft, overlapping navy-tinted light curtains that drift gently, anchored by a radial glow in the lower-left.

Install

  1. Download the skill as a ZIP:

    https://autogineer.com/agent-skills/mengto/atmosphere-background/download

  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip atmosphere-background.zip -d .agents/skills

Documentation by Meng To

Atmosphere Background Skill

Use When

  • Create a dark atmospheric background with drifting vertical light folds, screen-blended glow, and a concentrated luminous corner or lower-edge bloom.

Workflow

Scope

  • Apply this only to the immersive background layer, not to the full page layout, typography, or unrelated WebGL/particle systems.

  • Use it when the design needs a moody atmospheric backdrop with fluid light curtains or folds instead of geometric grids, blobs, or literal illustrations.

Visual target

  • Create a deep near-black background with soft vertical light folds drifting across the frame like illuminated fabric, fog sheets, or light curtains.

  • Build the glow from multiple overlapping vertical bands so the background feels layered and spatial rather than flat.

  • Let brightness accumulate more strongly toward one area, especially the lower right or lower edge, so the scene has a cinematic focal glow instead of uniform brightness.

  • Keep the palette restrained: dark navy or charcoal base, then derive the glow from the design's primary color or strongest accent color. If no clear brand color exists, a cool cyan-blue atmosphere is acceptable.

Implementation guidance

  • Prefer canvas or shader-driven rendering for this effect instead of static CSS gradients when motion is required.

  • Use multiple tall overlapping bands or folds with slow sine-wave drift so the structure reads as moving atmospheric light rather than hard columns.

  • Use screen or additive-style blending so the overlapping folds brighten naturally where they cross.

  • Shape each fold with vertical gradients that fade at the top and intensify toward the bottom or focal corner.

  • Add a subtle radial glow overlay near the focal edge or corner to reinforce depth and the main luminous area.

  • Motion should stay slow and meditative: gentle drift, slight intensity modulation, no noisy flicker or rapid pulsing.

Tuning knobs

  • Fold count: add or reduce the number of vertical folds depending on how dense the atmosphere should feel.

  • Drift: control horizontal sway amplitude and speed to keep motion calm.

  • Brightness focus: place the strongest glow near a corner, edge, or lower quadrant instead of spreading it evenly across the whole frame.

  • Color: tint the folds with the active design accent while preserving a dark, premium base.

  • Softness: adjust overlap width, gradient falloff, and post-glow strength so the background feels luminous but not washed out.

Avoid

  • Flat multi-stop gradients with no layered fold structure.

  • Loud rainbow color transitions or bright full-frame glow that competes with foreground content.

  • Hardcoded cyan if the design clearly uses another primary color.

  • Fast turbulence, noisy particle motion, or obvious repeating patterns that break the calm atmospheric look.

Files

demo/index.html

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" href="data:,">
  <title>Atmosphere Background · Skill Demo</title>
  <style>:root{--bg:#080a0f;--panel:rgba(18,21,29,.72);--panelStrong:#121620;--ink:#f2f5f7;--muted:#929aa7;--line:rgba(255,255,255,.14);--accent:hsl(25 92% 68%);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{min-width:320px;margin:0;background:radial-gradient(circle at var(--mx,76%) var(--my,16%),color-mix(in srgb,var(--accent) 16%,transparent),transparent 34%),var(--bg);color:var(--ink)}button,a{font:inherit;color:inherit}button{border:1px solid var(--line);border-radius:999px;padding:11px 15px;background:var(--panel);cursor:pointer}button:hover,button:focus-visible{border-color:var(--accent);outline:2px solid color-mix(in srgb,var(--accent) 42%,transparent);outline-offset:3px}.shell{width:min(1280px,calc(100% - 40px));min-height:100svh;margin:auto;padding:22px 0 40px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 0 30px;border-bottom:1px solid var(--line);font-size:11px;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.brand{display:flex;gap:9px;align-items:center}.brand i{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 24px var(--accent)}.topbar a{text-decoration:none}.intro{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:44px;align-items:end;padding:clamp(54px,9vw,116px) 0 42px}.intro small{display:block;margin-bottom:22px;color:var(--muted);font-size:10px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}.intro h1{max-width:11ch;margin:0;font-size:clamp(48px,8vw,112px);font-weight:580;letter-spacing:-.075em;line-height:.86}.intro p{max-width:48ch;margin:0;color:var(--muted);font-size:clamp(14px,1.2vw,18px);line-height:1.6}.showcase{position:relative;min-height:470px;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:var(--panel);isolation:isolate}.showcaseHeader{position:absolute;z-index:5;top:18px;right:18px;left:18px;display:flex;justify-content:space-between;color:var(--muted);font-size:9px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;pointer-events:none}.layoutStudy{display:grid;grid-template-columns:1.15fr .85fr;min-height:470px}.layoutHero{display:flex;flex-direction:column;justify-content:flex-end;padding:clamp(28px,5vw,70px);border-right:1px solid var(--line)}.layoutHero>span,.kicker{color:var(--muted);font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.layoutHero h2,.landing h2{max-width:9ch;margin:18px 0;font-size:clamp(42px,6vw,84px);line-height:.9;letter-spacing:-.065em}.layoutHero p,.landing p{max-width:38ch;color:var(--muted);line-height:1.55}.layoutCards{display:grid;grid-template-rows:repeat(3,1fr)}.layoutCards article{display:flex;align-items:end;justify-content:space-between;padding:26px;border-bottom:1px solid var(--line)}.layoutCards article:last-child{border:0}.layoutCards b{color:var(--accent);font-size:34px}.layoutCards span{text-transform:uppercase;font-size:10px;letter-spacing:.15em}.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;min-height:470px;background:var(--line)}.pricing article{display:flex;flex-direction:column;padding:80px 28px 28px;background:var(--panelStrong)}.pricing article.featured{background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 20%,var(--panelStrong)),var(--panelStrong))}.pricing p{font-size:11px;letter-spacing:.13em;text-transform:uppercase}.pricing strong{margin:24px 0 8px;font-size:56px;letter-spacing:-.06em}.pricing span{color:var(--muted)}.pricing button{margin-top:auto}.landing{display:flex;min-height:470px;flex-direction:column;justify-content:center;padding:clamp(40px,8vw,100px);background:radial-gradient(circle at 75% 36%,color-mix(in srgb,var(--accent) 45%,transparent),transparent 24%)}.landing .actions{display:flex;gap:10px;margin-top:24px}.landing .actions button:first-child{color:var(--bg);background:var(--ink)}.landing .proof{display:flex;gap:28px;margin-top:54px;color:var(--muted);font-size:11px}.marquee{display:flex;min-height:470px;align-items:center;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent)}.marqueeTrack{display:flex;width:max-content;animation:marquee 18s linear infinite}.marqueeTrack span{min-width:220px;padding:34px;border:1px solid var(--line);font-size:22px;font-weight:700;letter-spacing:-.04em;text-align:center}.iconGrid,.contactSheet{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;min-height:470px;background:var(--line)}.iconGrid article,.contactSheet article{position:relative;padding:70px 28px 28px;background:var(--panelStrong)}.number{position:absolute;top:22px;right:22px;color:var(--accent);font-size:11px}.glyph{display:grid;width:110px;height:110px;place-items:center;margin:30px auto;border:1px solid var(--line);border-radius:34px;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 20%,transparent),transparent);font-size:48px}.iconGrid h3{text-align:center}.contactSheet .asset{height:280px;margin-bottom:22px;border-radius:2px;background-size:cover}.assetOne{background:radial-gradient(circle at 70% 30%,#d9f7ff,transparent 20%),linear-gradient(145deg,#203962,#8db3d6 48%,#d7d5c8)}.assetTwo{background:radial-gradient(circle at 50% 28%,#f1c6a2 0 10%,transparent 11%),linear-gradient(120deg,#1b2738,#754c5a 52%,#e1a77f)}.assetThree{background:repeating-radial-gradient(circle at 30% 65%,#c8b8ff 0 9px,#4c4274 10px 18px,#151629 19px 29px)}.contactSheet b,.contactSheet span{display:block}.contactSheet span{margin-top:8px;color:var(--muted);font-size:11px}.surfaceStudy{display:grid;grid-template-columns:1.4fr .6fr;grid-template-rows:1fr auto;gap:18px;min-height:470px;padding:70px 24px 24px}.surfaceStudy article{border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 12%,var(--panelStrong)),var(--panelStrong))}.surfaceHero{display:flex;grid-row:1/3;flex-direction:column;justify-content:flex-end;padding:42px}.surfaceHero strong{max-width:8ch;margin-top:20px;font-size:clamp(40px,5vw,72px);line-height:.92;letter-spacing:-.06em}.surfaceHero span,.surfaceCard span{color:var(--muted);font-size:10px;letter-spacing:.14em;text-transform:uppercase}.surfaceCard{display:flex;flex-direction:column;padding:26px}.surfaceCard b{margin:auto 0 4px;font-size:56px}.surfaceCard small{color:var(--muted)}.surfaceControl{align-self:end}.motionStage{display:flex;min-height:470px;flex-direction:column;justify-content:center;padding:70px clamp(28px,7vw,90px)}.maskLine{overflow:hidden;margin:0;font-size:clamp(44px,7vw,98px);font-weight:600;letter-spacing:-.075em;line-height:.84}.maskLine span{display:block;transform:translateY(110%);animation:wordIn .8s cubic-bezier(.16,1,.3,1) forwards}.maskLine:nth-child(2) span{animation-delay:.12s}.maskLine:nth-child(3) span{animation-delay:.24s}.accentLine{color:var(--accent)}.timeline{display:flex;gap:8px;margin:42px 0 20px}.timeline i{width:58px;height:3px;background:var(--line);transform-origin:left;animation:grow .8s .42s both}.timeline i:nth-child(2){animation-delay:.54s}.timeline i:nth-child(3){animation-delay:.66s}.timeline i:nth-child(4){animation-delay:.78s}.replay{width:max-content}.visualization{position:relative;min-height:470px}.visualization canvas{position:absolute;inset:0;width:100%;height:100%}.vizMeta{position:absolute;right:28px;bottom:24px;left:28px;display:grid;grid-template-columns:1fr auto 1fr;align-items:end;color:var(--muted);font-size:10px;letter-spacing:.14em;text-transform:uppercase}.vizMeta strong{color:var(--ink);font-size:48px;letter-spacing:-.06em}.vizMeta span:last-child{text-align:right}.simulation{position:relative;min-height:470px}.goo{position:absolute;inset:0;width:100%;height:100%}.goo circle{fill:var(--accent)}.orbA{animation:orbA 4.4s ease-in-out infinite alternate}.orbB{animation:orbB 5.1s ease-in-out infinite alternate}.reset{position:absolute;right:24px;bottom:24px}.demoNote{display:flex;justify-content:space-between;gap:24px;padding:20px 2px;color:var(--muted);font-size:11px;line-height:1.5}.demoNote a{color:var(--ink)}
.pricingWrap{min-height:470px;padding-top:52px}.billingBar{display:flex;align-items:center;justify-content:space-between;min-height:58px;padding:8px 20px;border-top:1px solid var(--line);color:var(--muted);font-size:10px;letter-spacing:.12em;text-transform:uppercase}.billingBar .billingToggle{padding:8px 12px;background:var(--panelStrong);font-size:10px}.pricingWrap .pricing{min-height:360px}.pricingWrap .pricing article{padding:42px 28px 28px}.vizMeta button{justify-self:end;padding:8px 11px;font-size:9px;letter-spacing:.1em;text-transform:uppercase}

@keyframes marquee{to{transform:translateX(-50%)}}@keyframes wordIn{to{transform:translateY(0)}}@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes orbA{to{transform:translate(-120px,70px)}}@keyframes orbB{to{transform:translate(80px,120px)}}@media(max-width:760px){.intro{grid-template-columns:1fr;padding-top:60px}.intro h1{font-size:54px}.layoutStudy,.pricing,.iconGrid,.contactSheet,.surfaceStudy{grid-template-columns:1fr}.layoutHero{border-right:0;border-bottom:1px solid var(--line)}.pricing article{min-height:320px}.surfaceHero{grid-row:auto}.showcase{min-height:540px}.topbar span:last-child{display:none}.demoNote{flex-direction:column}.landing .proof{flex-direction:column;gap:8px}.vizMeta{grid-template-columns:1fr auto}.vizMeta span:last-child{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.marqueeTrack,.maskLine span,.timeline i,.orbA,.orbB{animation:none;transform:none}}</style>
</head>
<body data-kind="canvas" data-skill="atmosphere-background">
  <main class="shell">
    <nav class="topbar" aria-label="Demo navigation"><a class="brand" href="#"><i></i>Atmosphere Background</a><span>Standalone skill reference · 01</span></nav>
    <header class="intro">
      <div><small>web design / reference demo</small><h1>Atmosphere Background</h1></div>
      <p>Create a dark atmospheric background with drifting vertical light folds, screen-blended glow, and a concentrated luminous corner or lower-edge bloom.</p>
    </header>
    <section class="showcase" aria-label="Atmosphere Background demonstration">
      <div class="showcaseHeader"><span>Live example</span><span>canvas</span></div>
<div class="visualization">
  <canvas aria-label="Atmosphere Background procedural visualization"></canvas>
  <div class="vizMeta"><span>Live field</span><strong>72.4</strong><span>Live signal</span></div>
</div>
    </section>
    <footer class="demoNote"><span>Open <strong>PROMPT.md</strong> for the exact recreation and remix prompts.</span><a href="PROMPT.md">Read prompt →</a></footer>
  </main>
  <script>const reduced=matchMedia("(prefers-reduced-motion: reduce)").matches;addEventListener("pointermove",event=>{document.body.style.setProperty("--mx",event.clientX+"px");document.body.style.setProperty("--my",event.clientY+"px")},{passive:true});const billing=document.querySelector(".billingToggle");if(billing)billing.addEventListener("click",()=>{const annual=billing.getAttribute("aria-pressed")!=="true";billing.setAttribute("aria-pressed",String(annual));billing.textContent=annual?"Show monthly pricing":"Show annual pricing";document.querySelectorAll(".pricing strong").forEach(price=>price.textContent=annual?price.dataset.annual:price.dataset.monthly)});const replay=document.querySelector(".replay");if(replay)replay.addEventListener("click",()=>{document.querySelectorAll(".maskLine span,.timeline i").forEach(node=>{node.style.animation="none";node.offsetHeight;node.style.animation=""})});const reset=document.querySelector(".reset");if(reset)reset.addEventListener("click",()=>document.querySelectorAll(".orbA,.orbB").forEach(node=>{node.style.animation="none";node.offsetHeight;node.style.animation=""}));const canvas=document.querySelector("canvas");if(canvas&&!reduced){const context=canvas.getContext("2d");let width=0,height=0,frame=0,time=0;const mode="field";const bodies=Array.from({length:14},(_,i)=>({x:80+(i%7)*92,y:40+Math.floor(i/7)*70,vx:(i%3-1)*.7,vy:0,r:12+(i%4)*5}));const resetBodies=()=>bodies.forEach((body,i)=>{body.x=40+(i%7)*Math.max(32,(width-80)/6);body.y=35+Math.floor(i/7)*58;body.vx=(i%3-1)*.7;body.vy=0});const resetBodiesButton=document.querySelector(".resetBodies");if(resetBodiesButton)resetBodiesButton.addEventListener("click",resetBodies);const resize=()=>{const rect=canvas.getBoundingClientRect();const ratio=Math.min(devicePixelRatio||1,2);width=rect.width;height=rect.height;canvas.width=Math.round(width*ratio);canvas.height=Math.round(height*ratio);context.setTransform(ratio,0,0,ratio,0,0)};const draw=()=>{frame=requestAnimationFrame(draw);time+=.008;context.clearRect(0,0,width,height);const accent=getComputedStyle(document.documentElement).getPropertyValue("--accent").trim();if(mode==="globe"){const radius=Math.min(width,height)*.29;const cx=width*.5,cy=height*.47;context.fillStyle=accent;for(let i=0;i<360;i++){const phi=Math.acos(1-2*(i+.5)/360);const theta=Math.PI*(1+Math.sqrt(5))*i+time;const x=Math.sin(phi)*Math.cos(theta);const y=Math.cos(phi);const z=Math.sin(phi)*Math.sin(theta);const scale=(z+1.7)/2.7;context.globalAlpha=.16+.74*scale;context.beginPath();context.arc(cx+x*radius,cy+y*radius,Math.max(.7,2.2*scale),0,Math.PI*2);context.fill()}context.globalAlpha=.16;context.strokeStyle=accent;context.beginPath();context.ellipse(cx,cy+radius*.18,radius*1.34,radius*.34,time*.4,0,Math.PI*2);context.stroke()}else if(mode==="object"){const size=Math.min(width,height)*.24,cx=width*.5,cy=height*.48;const vertices=[[-1,-1,-1],[1,-1,-1],[1,1,-1],[-1,1,-1],[-1,-1,1],[1,-1,1],[1,1,1],[-1,1,1]];const edges=[[0,1],[1,2],[2,3],[3,0],[4,5],[5,6],[6,7],[7,4],[0,4],[1,5],[2,6],[3,7]];const points=vertices.map(([x,y,z])=>{const a=time*1.1,b=time*.73;const x1=x*Math.cos(a)-z*Math.sin(a),z1=x*Math.sin(a)+z*Math.cos(a),y1=y*Math.cos(b)-z1*Math.sin(b),z2=y*Math.sin(b)+z1*Math.cos(b),p=3.8/(z2+5);return{x:cx+x1*size*p,y:cy+y1*size*p,z:z2,p}});context.strokeStyle=accent;context.lineWidth=1.4;context.shadowColor=accent;context.shadowBlur=12;for(const [a,b] of edges){context.globalAlpha=.25+.45*((points[a].z+points[b].z+4)/8);context.beginPath();context.moveTo(points[a].x,points[a].y);context.lineTo(points[b].x,points[b].y);context.stroke()}context.fillStyle=accent;for(const point of points){context.globalAlpha=.55+.35*(point.z+2)/4;context.beginPath();context.arc(point.x,point.y,3.2*point.p,0,Math.PI*2);context.fill()}context.shadowBlur=0}else if(mode==="matter"){context.fillStyle=accent;for(const body of bodies){body.vy+=.16;body.x+=body.vx;body.y+=body.vy;if(body.x<body.r||body.x>width-body.r){body.vx*=-.94;body.x=Math.max(body.r,Math.min(width-body.r,body.x))}if(body.y>height-body.r-30){body.y=height-body.r-30;body.vy*=-.78}context.globalAlpha=.28+.45*(body.r/32);context.beginPath();context.arc(body.x,body.y,body.r,0,Math.PI*2);context.fill()}context.globalAlpha=.22;context.fillRect(0,height-31,width,1)}else{context.strokeStyle=accent;context.lineWidth=1;for(let i=0;i<18;i++){const y=(i/17)*height;context.globalAlpha=.08+.12*Math.sin(time+i*.4);context.beginPath();for(let x=0;x<=width;x+=12){const wave=Math.sin(x*.012+i*.54+time*3)*18*Math.sin(i/17*Math.PI);context.lineTo(x,y+wave)}context.stroke()}context.globalAlpha=.65;const x=width*(.52+.16*Math.sin(time*.6));const gradient=context.createLinearGradient(x,0,x+2,0);gradient.addColorStop(0,"transparent");gradient.addColorStop(.5,"white");gradient.addColorStop(1,"transparent");context.fillStyle=gradient;context.fillRect(x,0,3,height)}};resize();new ResizeObserver(resize).observe(canvas);const visibility=()=>{if(document.hidden){cancelAnimationFrame(frame);frame=0}else if(!frame)draw()};document.addEventListener("visibilitychange",visibility);draw();}</script>
</body>
</html>

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Security

No issues found by our static scan· No issues found

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Attribution and licence

Created by
Meng To
Publisher
Meng To (Community)
Source
MengTo/Skills · agent-skills/web-design/atmosphere-background · commit 5ea1661
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

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Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download atmosphere-background.zip