SandFlow — Interactive Water & Sand Sandbox
GPU shallow-water and sand simulation sandbox: real waves, erosion, sandcastles, digging tools, draggable rocks and floating props. Compute-based, mass-conserving, Unity 6.
by u3d
Price History +
SandFlow turns a patch of your scene into a living beach diorama: a real-time GPU shallow-water solver coupled to granular sand transport, running entirely in compute shaders.
WATER. A mass-conserving shallow-water core (Rusanov flux, positivity-preserving reconstruction) drives waves, surf, swash and backwash. Procedural wave dressing, caustics, foam, whitecaps and spray render on top of the simulated surface. Water level, wave amplitude, drift ripple and more are tunable live.
SAND. Sand erodes, travels with the flow and settles: dig channels, watch the sea carve the shore, build dams and watch them fail realistically. Wet sand darkens and smooths; dry sand keeps wind ripples.
INTERACTION. A full toolset ships in the demo: a shovel that scoops and pours real volume, castle stamps, terrain brushes, cannons, draggable rocks and props that displace water honestly and leave prints that heal, plus floating objects with buoyancy and wakes.
TUNING. An in-game control panel exposes the simulation and look parameters, with persistent settings, map presets (beaches, rivers, lagoons, atolls) and camera controls.
Ships as clean C# + compute/HLSL source with a complete interactive demo scene and a standalone-build entry point. Desktop platforms with compute shader support (DX11/DX12, Vulkan, Metal).
