Paint pixels. Watch chaos unfold. Pixel Rain is a relaxing falling-sand physics sandbox where every cell on a giant grid obeys its own rules. Pour water, drop sand, ignite lava, grow crystals — then sit back and watch it all interact. There's no campaign, no fail state, no pressure. Just you, a canvas full of physics-driven pixels, and a lot of satisfying emergent behaviour. Hundreds of Materials to Paint With Sand — piles and settles naturally Water — flows, pools, and reacts with almost everything Lava — turns water into steam, melts ice, ignites everything nearby Acid — slowly corrodes stone, metal, and crystal Oil — floats on water, highly flammable Crystal — grows from water and ice into spreading formations Plant — feeds on water and spreads organically Plasma — decays into sparks over time Void — silently erases everything it touches Magnet — pulls nearby metal cells toward it Plus: Paint, Slime, Foam, Snow, Ice, Smoke, Spark, Stone, Metal …and 400+ more — from concrete, salt and sawdust to charged crystal, living wood and brimstone. Combine any two materials and you might discover a brand-new one. Features 60 FPS physics simulation on a dynamic grid up to ~620×480 cells 400+ paintable materials and brush presets with scatter, sparkle, and jitter tuning 6 customizable quick-slot brushes Adjustable gravity, flow speed, brush size, and zoom 3 procedurally synthesized music modes: Rain, Magma, and Aurora Procedural sound effects keyed to each material — no audio files, all generated in real time One-button MP4 clip export (R to record, R to save) Showcase cinematic mode (T) — the camera finds the most active region of your canvas and records it automatically Save and load your canvas, synced across devices with Steam Cloud 100+ Steam achievements with progress bars and in-game toasts 50+ discoverable recipes — combine two materials to alchemize a third Steam Workshop — design your own materials, brushes and animations with built-in editors (plus a DevMode code editor), then share them and subscribe to community creations Built-in tutorial to get you started Custom color palette and lobby theming