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

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.