SunaBox - The Particle Sandbox That Remembers

In 2007, Prometech released OE-CAKE! It was supposed to be a technology demo... instead, it quietly became one of the internet's favorite physics toys.

SunaBox is a love letter to that toy and its community: a clean-room successor, rebuilt from scratch, that opens your old .oec files and keeps going where 2007 could not.

🖌️ Paint in 27 shades of matter

Water, gel, oil, mercury, acid, nitro, rice, rubber, wood, stone, metal, ice,

lava, fire, smoke, steam and more. Every material behaves differently. Ice

melts. Wood burns to ash. Steam condenses. Nitro does... what nitro does.

⚙️ Machines that really run

Weld strokes into rigid bodies, pin them on axles, drive them with jets,

stretch rubber into slingshots, or take the controls yourself. The arrow keys

can drive what you paint.

🖼️ Drop in any PNG and it becomes matter

Your drawing. Your logo. A photo of your cat. Rigid. Liquid. Flammable.

Whatever you choose. Old OE-CAKE .oec scenes open too, preserved

exactly.

⏪ The sandbox that remembers

The engine is deterministic and bit-exact, so a session is a starting state plus your inputs.

Replay it, scrub it backwards, share it as a file that provably reproduces

the same world, bit for bit. No other physics toy can say that.

🕹️ OE-CAKE Classic mode

One toggle and the toolbar becomes OE-CAKE's, laid out exactly as you

remember it. Same toolbar, same buttons, same order, same muscle memory,

fifteen years later.

Features at a glance

• 27 paintable materials with real thermodynamics

• Rigid bodies, axles, jets, drivable machines

• Perfect replays and smooth rewind on a deterministic engine

• PNG import and faithful .oec import

• Lightning, drains, collectors, orbies that really swell

• Classic OE-CAKE interface built in

• Open-source engine (AGPL) - SunaEngine

• Steam Deck, Windows, macOS and Linux