StochasticGrain vs Roll Relay

Unlike simple noise overlays, this app uses a physics-based approach where grain density responds to image brightness, just like analog film. Shadows show more grain, highlights stay cleaner. The result feels organic rather than digital. Built on academic research by Newson, Delon, and Galerne (2017) modeling stochastic film grain through Boolean models, with real-time optimizations informed by Zhang et al.'s 2023 SIGGRAPH work. These papers describe how actual silver halide crystals distribute in photographic emulsion. Exposure-dependent grain that responds to image luminance Real-time preview as you adjust Designed for film photography enthusiasts A passion project for anyone who appreciates the texture of analog photography.

Roll Relay turns your camera roll into synchronized video collages. Pick your clips — up to 48 of them — and they land on a single canvas, all playing at once. Drag to reposition. Pinch to resize. Shuffle until it clicks. Or pick a preset: Grid, Stack, Cascade, Scatter. Double-tap any layer to edit it. Trim, crop, adjust volume, reposition. Timeline at the bottom when you need precision. Export in whatever ratio you need — 9:16 for stories, 16:9 for widescreen, 1:1, 4:5. Full resolution. Transparent background option if you want to composite it elsewhere. Dark interface. Metal GPU rendering. Haptic feedback throughout. No account. No watermark. No subscription.