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

Early Access

Pixel Rain is in Early Access. The core simulation is fully playable and stable. Expect new materials, brush tools, and quality-of-life improvements as development continues. Feedback welcome.