Real-time fluid in the browser: Water Simulation 2026

Fly

W A S D, Space or Q to rise, E to sink, Shift to go faster

Look

Hold the left or right mouse button and drag

Grab a ball

Hold Ctrl, click a ball and drag it; the wheel pushes it away or pulls it closer

Balls

K drops ten more; R twice resets the pool

Wind

↑ ↓ speed, ← → heading, V shows the wind arrow

The bar at the bottom of the view has the same buttons; hold Ctrl to click them. A touch screen can switch on the touch controls with the Touch box in the header.

Move and look

Left stick flies, right stick turns; dragging the view away from the balls turns too

Up and down

The arrow buttons; the lightning button flies faster

Grab a ball

Touch a ball and drag it around the pool

Balls

+10 drops ten more; the circular arrow resets the pool (press it twice)

Wind

The bar at the top of the view: − and + set the speed, « and » the heading

Touch in the header hides the controls; OnTop lays them over a full-screen view.

Move and look

Left stick flies, right stick turns

Up and down

The arrow buttons; the lightning button flies faster

Grab a ball

Touch a ball and drag it

Balls

+10 drops ten more; the circular arrow resets (press it twice)

Wind

The bar at the top of the view

Turn the phone sideways for a larger view. The water solver is heavy for a phone GPU, so 960 x 540 is the default.