Ultimate Mechanical Sandbox

Explore a true 3D mechanical proving ground with exposed piston engines and a free orbiting camera.

Tune throttle, cooling and dyno load; pass a 15-second endurance test or push an engine into overheating. Switch between inline, V, boxer, radial, rotary and turbine layouts.

Drop wood, glass, steel, rubber, concrete, ice and aluminum objects. Grab them, smash them, ignite wood, spill gasoline, quench flames with water, and experiment with sand piles and hot lava. Drive the test buggy into a crate stack.

Operate a tank, pump, valve and hose rig with water, gasoline, diesel, kerosene, oil, hydraulic fluid or coolant. Fluids have different flow rates; a closed valve can overpressure and leak.

This is a compact sandbox with rigid-body collisions and simplified heat, combustion, fluids, fracture and engine models. It does not yet include a full industrial fluid network, deformable machinery, or a massive world.