About Fluid Frenzy

Key Features Contents Requirements Limitations Pipeline Support Platform Support Feature Support

Installation

Package Manager Unity Package File

Samples

Importing Samples Universal Render Pipeline Running Samples River Grand Canyon Water Modifiers Volcano Terraform Fossil Finder Pool Simple Terraform Tiled Simulation Runtime Setup GPULOD Terrain Scene Configuration

Setup

Simulation Time Step Water Simulation Terraform Simulation Simulation Regions Fluid Channels Shader Stripper GPULOD Displacement Waves Flow Mapping Ocean FFT Cascades Sampling Universal Render Pipeline High-Definition Render Pipeline

Fluid Frenzy Toolbar

Accessing the Toolbar Simulation Preview Modes Sculpt Mode (WIP) Modifier Mode Shared Settings Terrain or Fluid Layer Splat Channels Blend Mode Tool Properties

Fluid Simulation Components

Fluid Simulation Terrain and Obstacle Input Boundary Conditions Side Border Settings Domain Solver Initial Conditions Terrain & Ground Simulation Culling Extension Layers Create Collider Fluid Simulation Settings Creation Properties Second Layer Flux Fluid Simulation The Pipe (Flux) Model Simulation Characteristics Flux Fluid Simulation Settings Creation Specialized Flux Properties Flow Fluid Simulation The 2D Height Field Model Performance and Stability Solver Ocean FFT Coupling Flow Fluid Simulation Settings Creation Specialized Flow Properties Foam Layer Foam Layer Settings Foam Render Settings Foam Decay Settings Foam Pressure Settings Foam Wave Settings Shallow Foam Settings Turbulence Foam Settings Wetness Layer Wetness Layer Settings Rendering Settings Decay Settings Fluid Flow Mapping Fluid Flow Mapping Settings Erosion Layer Multi-Layer Terrain System Terrain Modification Processes Erosion Settings Terraform Layer Liquefaction (Solid Terrain to Fluid) Fluid Contact Reactions (Fluid and Terrain) Fluid Mixing (Fluid + Fluid to Solid Terrain) Fluid Contact Reaction Terraform Settings Terrain Modifier Terrain Modifier Settings Terraform Modifier Fluid Particle Generator Splash Particles Surface Particles Fluid Particle System Fluid RigidBody Prerequisite Fluid Density Calibration Interaction Calculation Fluid Displacement Profile Fluid Interaction Profile Fluid RigidBody Lite Fluid Floater Fluid Simulation Obstacle Settings Fluid Event Trigger

Fluid Rendering Components

Fluid Renderer Fluid World Renderer Fluid Renderer vs Fluid World Renderer Setting up a tiled world Which simulations are included General Mesh Rendering Water World Renderer Ocean FFT Settings Surface Renderer Render Properties Detail Wave Effect Detail Wave Settings HDRP Water Surface Properties Water Rendering Water Surface Underwater Effect Underwater Settings Current Particles Current Particle Settings Wet Lens Effect Wet Lens Settings Caustics Effect Caustics Settings Surface Reflections Fluid Decal Renderer Lava Lava Surface Under Lava Effect Shadows HDRP Water System

Fluid Shaders

Water Shader Stylized Water Shader Toon Water Shader Lava Shader Particle Shaders Fluid Decal Shader

Terrain

Simple Terrain Terraform Terrain Terraform Terrain Shader Terraform Terrain (Single Layer) Shader

Fluid Modifiers

Fluid Modifier Volume Fluid Source Settings Fluid Flow Settings Fluid Force Settings Fluid Modifier Waves Fluid Modifier Pressure Foam Modifier

C# Interaction & Scripting

Fluid Simulation Manager Simulation control Adding fluid Applying flow and forces Sampling the simulation Creating simulations, modifiers, and obstacles Simulations Surfaces In-memory settings Extension layers Terraform terrain and simulation Editor presets Fluid modifiers Terrain and terraform brushes Obstacles

Using ShaderGraph

Fluid Simulation Nodes Terraform Terrain Nodes Particle Nodes Current Displacement Shaders

Tiled Simulations

Purpose Setup Padding for Continuity

Physics Colliders

Surface Collider GPU-CPU Synchronization and Performance Collider Properties

Simulation Debugger

Edit Mode Preview

AI Skills

How to use them

Third-party Support

Enviro 3 Sky and Weather COZY: Stylized Weather 3 Curved World

Future Updates & Roadmap

Fluid Frenzy: 2026 Development Roadmap Roadmap Overview Upcoming Feature Breakdown Old Roadmap

Fluid Frenzy Toolbar

The Fluid Frenzy Toolbar is a dedicated overlay for the Unity Scene View, designed to streamline fluid simulation, terrain, terraform, and obstacle modifier placement. It features a responsive UI that adapts to both horizontal and vertical layouts depending on your Scene View dimensions.

Accessing the Toolbar

To enable the toolbar in your Scene View, right-click on the Scene View tab (or the Overlay menu icon), navigate to Overlays, and select Fluid Frenzy > Toolbar.

Simulation Preview

The toolbar includes Play, Pause, Stop, and Reset for Edit Mode Preview. These controls match Window > Fluid Frenzy > Preview Simulation and the Preview button on the Fluid Simulation inspector. They are available in both Sculpt Mode and Modifier Mode.

Control Action
Play Starts the simulation in Edit Mode. If no simulations are enabled, every loaded simulation is started.
Pause Pauses the simulation. GPU resources stay allocated and the water stays frozen in place.
Stop Stops the simulation and releases GPU resources. Terraform and erosion terrain return to their authored maps. Preview is session-only and is not saved with the scene.
Reset Resets the water on simulations that are currently previewing.

Preview is disabled while Unity is in Play Mode. The solver then runs from Play Mode as usual.

Modes

The toolbar is divided into two primary modes of operation. You can switch between them using the toggle buttons located at the start of the toolbar.

Sculpt Mode (WIP)

Current Status: Under Development.

This mode is intended for painting heightmaps and texture layers directly onto the terrain. While the interface currently contains a placeholder Brush Selector, the functional sculpting logic is not yet implemented.

Modifier Mode

This mode provides a drag-and-drop palette for placing simulation and layout objects. To use these tools, simply click and drag an icon from the toolbar directly into the Scene View to spawn the object at that location.

Icon Component
Fluid Source
Fluid Force
Fluid Current
Fluid Vortex
Terrain Modifier
Terraform Modifier
Obstacle Cube
Obstacle Sphere
Obstacle Cylinder
Obstacle Elipse
Obstacle Wedge
Obstacle HexPrism
Obstacle Cone
Obstacle Capsule

Shared Settings

The settings panel allows you to configure properties that apply to the object being dragged or the brush being used.

Terrain or Fluid Layer

Selects the target layer for the operation (1, 2, 3, or 4). When placing a Fluid Source, only layers 1 and 2 are supported. For terrain operations, this corresponds to the specific erosion layer being modified.

Splat Channels

Selects the specific color channel (Red, Green, Blue, or Alpha) to modify. This setting is strictly for Terrain Modifiers and is only active when Layer 1 is selected. It has no effect on Fluid Modifiers or Obstacles.

Blend Mode

Determines how the tool interacts with existing data. Additive adds value to the current height or strength. Set overrides the current value with the specific setting. Minimum blends by taking the lowest value between the modifier and the existing data (useful for digging). Maximum blends by taking the highest value (useful for raising).

Tool Properties

These sliders adjust the physical properties of the object being spawned. Size controls the initial scale of the spawned object or the radius of the brush. Str (Strength) controls the intensity or opacity of the modifier. Rot (Rotation) applies an initial Y-axis rotation (0–360°) to the object.