Elevate your digital photography, portraits, and creative graphics with cinematic lens shading, vintage dark borders, ethereal white glows, and center-focused optical falloff directly in your browser. The RiazHub Universal Image Vignette & Optical Shading Studio features multi-topology geometric shapes (radial circular, aspect-adaptive ellipse, rectangular box border, and linear edge shading), a granular optical calibrator with 0%–100% intensity, inner clearance, feather smoothness, 360° rotation angle, and aspect squish controls. Pinpoint subject focus with an interactive on-canvas draggable reticle, click-to-center targeting, and a 3×3 rule-of-thirds anchor grid. Enhance your creative workflow with photographic composite blend modes (Multiply, Soft Light, Overlay, Screen), sub-pixel procedural film grain to eliminate 8-bit gradient banding, a 60 FPS split-screen comparison slider, a 200%/400% zoom inspection loupe, multi-image batch queue processing (up to 50+ photos), 1-click clipboard copying, and zero-dependency in-memory PKZIP archive packaging with 100% client-side privacy.
Universal Image Vignette & Optical Shading Studio 🔒 100% In-Browser Privacy
Add cinematic lens falloff, vintage dark borders, ethereal white glows, and center-focused shading in real time. Features multi-topology geometric shapes, dual-axis reticle positioning, composite blend modes, film grain anti-banding, split-screen comparator, and instant in-memory ZIP exporting.
📁 Source Photography
1 Photo Active📐 Vignette Geometry & Shape
🎯 Dual-Axis Focal Targeting
Click canvas or drag reticleInstantly anchor vignette focus to subject faces, eyes, or horizon points.
🎨 Optical Color & Blending
⚙️ Output Settings
📖 Optical Physics, Cosine-Fourth Law & Lens Vignetting Guide
🔬 Natural Optical Falloff (Cosine-Fourth Law)
In physical optical lenses, light illumination naturally diminishes toward sensor edges according to the law $E = E_0 \cos^4 \theta$. Modern digital software replicates this organic phenomenon to guide viewer gaze toward central focal anchors while muting distracting background edges.
🎨 Photographic Blending: Multiply vs Soft Light
Flat black overlays wash out color vibrance and create muddy grays. The Multiply blend mode preserves natural dark tones by multiplying normalized pixel color values, while Soft Light infuses subtle cinematic contrast without crushing dynamic shadow detail.
✨ Anti-Banding Procedural Dithering
Smooth radial gradients frequently suffer from visible stair-step color quantization on 8-bit displays. Our procedural film grain injector applies subtle sub-pixel luminance noise ($\pm 4$ levels) to seamlessly blend gradients and replicate fine analog film grain.
🔒 100% In-Browser Client-Side Processing
Your photographs, wedding portraits, and high-resolution creative works are rendered strictly inside your local browser via HTML5 Canvas and Web APIs. Zero pixel data or metadata is ever transmitted over network connections or stored on remote servers.