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 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 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 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

Using ShaderGraph

Fluid Simulation Nodes Terraform Terrain Nodes Particle Nodes

Tiled Simulations

Purpose Setup Padding for Continuity

Physics Colliders

Surface Collider GPU-CPU Synchronization and Performance Collider Properties

Simulation Debugger

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 Shaders

Fluid Frenzy ships dedicated surface shaders for water, lava, and GPU particles. Assign them to the materials used by Water Surface, Lava Surface, and Fluid Particle System components.

All water surface shaders sample the same Fluid Simulation data (height, velocity, foam, flow) and work with Water Surface features such as underwater effects, caustics, planar reflections, and screen-space reflections.

Water Shader

The FluidFrenzy/Water shader is applied to the material used by the Water Surface component. It provides a comprehensive set of material properties for creating visually appealing water.

Compatibility: This shader is compatible with both the Universal Render Pipeline (URP) and the Built-in Render Pipeline (BiRP).

Note: The High Definition Render Pipeline (HDRP) requires a separate, dedicated shader: FluidFrenzy/HDRP/Water.

Lighting

Properties controlling the illumination and shading effects.

Water Shader

Property Description
Specular Intensity Scales the brightness of specular highlights from the main directional light.
Sun Roughness Controls the roughness of direct specular highlights from lights (lower = sharper highlight, higher = broader highlight).
Shadows Enables or disables whether the water surface receives shadows.
Reflection

Properties controlling the water surface’s reflection of the environment.

Water Shader

Property Description
Reflection Roughness Controls how blurry reflection probes (and HDRP smoothness) appear (lower = sharper reflections, higher = blurrier reflections).
Planar Reflection Enables or disables the use of planar reflections instead of only reflection probes.
Surface Reflections Selects how the water surface reflects the environment: reflection probes only, planar camera reflections, or screen-space ray marched reflections (BiRP / URP).
Reflectivity Offset Offsets the base reflectiveness of the water surface.
Use this to ensure the water is reflective even at sharp viewing angles.
Distortion Scales the distortion applied to planar reflections.
Absorption

Properties controlling depth-based color, transparency, and refraction effects.

Water Shader

Property Description
Color RGB sets the color of the water at maximum depth. Alpha (A) is the base transparency of the water.
If ‘Refraction Mode’ is ‘Screenspace Absorb’, RGB is a color multiplier where White (1.0) is fully transparent.
For ‘Alpha’ or ‘Screenspace Tint’, RGB is the final color tint the water reaches at maximum depth/opacity.
Depth Transparency Scales the rate at which the water’s color changes and transparency fades based on depth. Lower values make the water more transparent at a faster rate.
Refraction Mode Selects the method for rendering water transparency and refraction:

- Alpha: Simple alpha blending transparency.
- Opaque: Water is rendered as a solid, non-transparent surface.
- Screenspace Tint: Uses screen-space refraction (GrabPass). Color interpolates from clear to the set color based on depth. Use for a single water color tint.
- Screenspace Absorb: Uses screen-space refraction (GrabPass). Scene color is multiplied by water color, allowing for a color gradient (e.g., clear to turquoise to blue).
Distortion Scales the amount of distortion applied to the screenspace refraction effect (‘Screenspace Tint’ or ‘Screenspace Absorb’ modes).
Subsurface Scattering

Properties controlling the diffusion of light and subsurface scattering effect beneath the water surface.

Water Shader

Property Description
Color The tint of light scattered inside the water, like underwater fog or sun through shallow waves.
Intensity Master multiplier on all scatter terms below.
Ambient Scattering Constant glow from ambient light across the whole surface. Needs baked GI to show on BiRP.
Height Scattering Adds ambient glow on wave crests where the water is raised.
Displacement Scattering Adds ambient glow where the surface is choppy or horizontally displaced.
Scattering Wave Height Typical wave height used to scale Height and Displacement scattering. Lower values make those sliders more sensitive.
Body Scattering How much the sun glows through flat areas and wave troughs.
Tip Scattering How much the sun glows through wave crests. Usually the most visible of the two.
Foam Contribution Scales the subsurface scattering contribution in areas covered by foam.
Waves

Properties for adding detail to the water surface using normal mapping and procedural vertex displacement.

Water Shader

Property Description
Normal Map Texture used to add fine detail to the water’s normals for lighting and PBR shading.
Velocity Influence Min = Strength at resting water. Max = Max strength multiplier at high velocity.
Foam

Properties controlling the appearance and masking of the foam effect.

Water Shader

Property Description
Foam Color Sets the Foam Color (RGB) and acts as a multiplier/mask (A) for the Foam Map’s transparency.
Foam Map Texture used for the foam’s diffuse color (RGB) and its base mask/transparency (A).
Foam Normal Map Normal map texture used to add PBR lighting detail to the foam.
Foam Visibility Range Sets the minimum and maximum threshold values for when the foam becomes visible and reaches its maximum strength. Foam visibility is interpolated between these values using a smoothstep function.
Screenspace Particles Enables the use of the screenspace particles (from the FluidParticles component) as an additional mask to generate foam.
Foam Mode Selects the blending method for the foam:

• Albedo: Soft foam using the Foam Map for color and mask.
• Clip: Hard-edged foam using the Foam Map’s red channel as a clip value for sharp borders.
• Mask: Uses the Foam Layer Mask’s value to select one of the Foam Map’s RGB channels as an extra mask for blending the foam color, allowing for varied intensity: 0-0.334 uses Blue, 0.334-0.667 uses Green, and 0.667-1 uses Red.
Foam Smoothness Controls how glossy the foam appears. Lower values produce matte, chalky whitecaps.
Water Specular Suppress Lowers water smoothness (sun spec + reflections) on visible foam. 1 = matte foam smoothness, 0 = no change.
Foam Ambient Floor Minimum brightness for foam in shadowed areas.
Rendering

General rendering, depth-handling, and simulation sampling properties.

Water Shader

Property Description
Layer Selects which layer (e.g., Water or Lava, etc.) from the Fluid Simulation field to sample for effects.
Fade Height The world height at which the water will be fully faded out.
Used to soften edges or blend with geometry above a certain height.
Linear Clip Offset A linear offset applied to the clip-space Z depth
to help prevent visual clipping (Z-fighting) with close terrain or surfaces.
Exponential Clip Offset An exponential/depth-based offset applied to the clip-space Z depth
to help prevent visual clipping (Z-fighting) with distant terrain or surfaces.
UV Space Controls which coordinate space is used for sampling Wave Normal / Foam / Detail Waves.

- Normalized UV Space: uses simulation UVs in 0..1.
- World UV Space: uses world XZ planar UVs. In this mode the texture tiling values are interpreted as repeats per meter (1,1 repeats every meter).
Non-Tiled Sampling Hides texture tiling artifacts on the wave normal, detail waves and foam by sampling a noise key once and offsetting samples. Slight extra cost.

Stylized Water Shader

The FluidFrenzy/StylizedWater shader is applied to the material used by the Water Surface component. It provides a stylized look driven by the fluid simulation.

Compatibility: This shader is compatible with both the Universal Render Pipeline (URP) and the Built-in Render Pipeline (BiRP).

Lighting

Properties controlling the illumination and shading effects.

Property Description
Specular Scales water specular reflectance (F0). Brightness of GGX highlights from the main light.
Specular Roughness Perceptual roughness of the specular lobe. 0 = tight sharp highlights, 1 = broad soft highlights. Uses stylized GGX (Unity Standard PBS).
Sparkle Sun glitter from wave normals. Assign Wave Normals for best results.
Sparkle Size Lower is tighter; higher is larger glints.
Flow Tint Soft color streaks following simulation velocity.
Shadows Enables or disables whether the water surface receives shadows.
Reflection

Properties controlling the water surface’s reflection of the environment.

Property Description
Strength Scales sky/probe reflections blended by Fresnel.
Fresnel Controls how strongly reflections increase at grazing angles.
Reflectivity Offset Offsets the base reflectiveness of the water surface.
Use this to ensure the water is reflective even at sharp viewing angles.
Reflection Roughness Controls how blurry reflection probes appear (lower = sharper, higher = blurrier).
Planar Reflection Enables or disables the use of planar reflections instead of only reflection probes.
Surface Reflections Reflection probes only, planar camera reflections, or screen-space reflections (BiRP / URP).
Distortion Scales the distortion applied to planar reflections.
Absorption

Properties controlling depth-based color, transparency, and refraction effects.

Property Description
Shallow Color Water color near the shore / shallow scene depth.
Deep Color Water color at greater scene depth.
Horizon Color Tint at grazing view angles.
Horizon Strength How strongly horizon color is applied.
Horizon Power Higher concentrates horizon tint toward the silhouette.
Depth Scale Scene depth used for shallow/deep color. Higher stays shallow farther from shore.
Opacity Base transparency / absorption strength of the water.
Depth Transparency Scales how quickly opacity/absorption builds with underwater path depth.
Refraction Mode Selects the method for rendering water transparency and refraction:

- Alpha: Simple alpha blending transparency.
- Opaque: Water is rendered as a solid, non-transparent surface.
- Screenspace Tint: Uses screen-space refraction. Color interpolates from clear to the set color based on depth.
- Screenspace Absorb: Uses screen-space refraction. Scene color is multiplied by water color.
Distortion Scales the amount of distortion applied to screenspace refraction.
Waves

Properties for adding detail to the water surface using normal mapping.

Property Description
Normal Map Optional scrolling/flowing normal map. Detail-wave normals come from the Displacement Waves effect when enabled.
Velocity Influence Min = Strength at resting water. Max = Max strength multiplier at high velocity.
Foam

Properties controlling the appearance and masking of the foam effect.

Property Description
Foam Color RGB = foam tint. Alpha = clip cutoff for Foam Map.
Foam Map Flow-mapped foam pattern. Red channel is clipped against Foam Color alpha for sim foam and edge foam.
Amount Scales the simulation foam mask that opens the clip.
Foam Visibility Range Sets the minimum and maximum threshold values for when the foam becomes visible and reaches its maximum strength.
Edge Foam Intersection foam width from scene depth.
Edge Texture How much Foam Map breaks up the shore rim (0 solid, 1 full clip).
Rendering

General rendering, depth-handling, and simulation sampling properties.

Property Description
UV Space Controls which coordinate space is used for sampling Wave Normal / Foam / Detail Waves.

- Normalized UV Space: uses simulation UVs in 0..1.
- World UV Space: uses world XZ planar UVs. In this mode the texture tiling values are interpreted as repeats per meter.
Layer Selects which layer from the Fluid Simulation field to sample for effects.
Fade Height The height at which the water will be fully faded out.
Used to soften edges or blend with geometry.
Linear Clip Offset A linear offset applied to the clip-space Z depth
to help prevent visual clipping (Z-fighting) with close terrain or surfaces.
Exponential Clip Offset An exponential/depth-based offset applied to the clip-space Z depth
to help prevent visual clipping (Z-fighting) with distant terrain or surfaces.
Non-Tiled Sampling Hides texture tiling artifacts on the wave normal, detail waves and foam by sampling a noise key once and offsetting samples. Slight extra cost.
Cull Mode Which faces are culled when rendering the water surface.

Toon Water Shader

The FluidFrenzy/ToonWater shader is applied to the material used by the Water Surface component. It provides a cartoon/cel-shaded look driven by the fluid simulation.

Compatibility: This shader is compatible with both the Universal Render Pipeline (URP) and the Built-in Render Pipeline (BiRP).

Lighting

Cartoon shading, sun highlights, glitter, and whether the water receives shadows.

Property Description
Lighting Ramp Optional greyscale strip that sets the light and shadow steps. Use Point filter and hard bands for a cartoon look. Leave white to use the built-in steps.
Specular Brightness of the hard sun highlight on the water.
Specular Roughness How large the sun highlight disc is. 0 = tight spot, 1 = wider disc. Still a hard cel edge (unlike Stylized GGX, which softens with roughness).
Sparkle Tiny bright glints from the waves catching the sun.
Sparkle Size How large those glints are. Lower is tighter; higher is bigger.
Shadows Whether the water surface receives shadows from other objects.
Reflection

How much of the sky and surroundings the water reflects.

Property Description
Strength Overall strength of environment reflections on the water.
Fresnel How much stronger reflections get when you look across the water at a shallow angle.
Reflectivity Offset Minimum reflection amount, even when looking straight down.
Reflection Roughness How sharp or blurry the reflected sky looks. Lower is sharper; higher is softer.
Planar Reflection Use a live mirrored reflection of the scene instead of only sky/probes.
Surface Reflections Reflection probes only, planar camera reflections, or screen-space reflections (BiRP / URP).
Distortion How much waves warp the planar reflection.
Absorption

Water color by depth, how clear it is, and how the bottom shows through.

Property Description
Shallow Color Water color near the shore or in shallow areas.
Deep Color Water color in deeper areas.
Horizon Color Extra tint when looking across the water toward the horizon.
Horizon Strength How strong that horizon tint is.
Horizon Power Higher keeps the horizon tint closer to the far edge of the view.
Depth Scale How quickly color shifts from shallow to deep. Higher keeps the shallow color farther from shore.
Opacity How solid the water looks. Higher hides more of the bottom.
Depth Transparency How quickly the water becomes opaque as you look through more of it.
Refraction Mode How the water shows the scene underneath:

- Alpha: Simple see-through blending.
- Opaque: Solid water with no see-through.
- Screenspace Tint: Distorts the scene and fades toward your water colors with depth.
- Screenspace Absorb: Distorts the scene and darkens/tints it with depth.
Distortion How much the water bends the view of the scene underneath.
Rim

Soft edge tint when looking across the water surface.

Property Description
Rim Color Color of the soft edge tint at glancing view angles.
Rim Power Higher keeps that soft edge tint closer to the silhouette.
Rim Strength How strong the soft edge tint is.
Waves

Properties for adding detail to the water surface using normal mapping.

Property Description
Normal Map Optional scrolling/flowing normal map. Detail-wave normals come from the Displacement Waves effect when enabled.
Velocity Influence Min = Strength at resting water. Max = Max strength multiplier at high velocity.
Foam

Properties controlling the appearance and masking of the foam effect.

Property Description
Foam Color Foam tint. Alpha controls how much of the Foam Map shows through.
Foam Map Pattern used for foam on the surface and along the shore.
Amount How much foam from the simulation appears on the surface.
Foam Visibility Range Where foam starts to appear and where it reaches full strength.
Edge Foam How wide the foam ring is along the shore.
Edge Texture How much the Foam Map breaks up the shore foam. 0 is a solid ring; 1 uses the full pattern.
Rendering

General rendering, depth-handling, and simulation sampling properties.

Property Description
UV Space Controls which coordinate space is used for sampling Wave Normal / Foam / Detail Waves.

- Normalized UV Space: uses simulation UVs in 0..1.
- World UV Space: uses world XZ planar UVs.
Layer Selects which layer from the Fluid Simulation field to sample for effects.
Fade Height The height at which the water will be fully faded out.
Linear Clip Offset Linear clip-space Z offset to reduce Z-fighting with close surfaces.
Exponential Clip Offset Depth-based clip-space Z offset for distant surfaces.
Non-Tiled Sampling Hides texture tiling artifacts on wave normal, detail waves and foam.
Cull Mode Which faces are culled when rendering the water surface.

Lava Shader

The FluidFrenzy/Lava shader is applied to the material used by the Lava Surface component. It creates realistic, flowing lava visuals where the ‘heat’ and resulting glow are dynamically driven by the length of the fluid’s velocity vector in the simulation.

The shader uses textures for the base ‘cold’ lava surface (Albedo, Smoothness, Normal Map) and employs a specialized Heat Look-Up Table (LUT) alongside an Emission Map to control the vibrant colors and intensity of the glowing, ‘hot’ lava. A separate Noise texture is used to break up tiling patterns.

Compatibility: The FluidFrenzy/Lava shader is for URP and BiRP. The High Definition Render Pipeline (HDRP) requires a separate, dedicated shader: FluidFrenzy/HDRP/Lava.

Lava Shader

Lighting

Properties controlling the illumination and shading effects.

Property Description
Light Intensity Scales the influence of the main directional light on the lava surface (e.g., specular highlights).
Shadows Enables or disables if the lava surface receives shadows from other scene objects.
Heat & Emission

Properties controlling the lava’s color and emission, driven by the fluid’s ‘heat’ (usually fluid velocity/movement).

Property Description
Heat LUT Color ramp for flowing molten lava. Sampled from how fast the lava is moving.
Heat Scale How quickly movement pushes the look through the Heat LUT. Higher reaches the hot end sooner.
Emission Map Texture used for the emission color of the lava. A sample of this texture is multiplied by the fluid’s ‘heat’.
Emission Scales the overall intensity of the emission determined by the Heat LUT and the Emission Map.
Material Properties

Properties controlling the cold lava surface’s visual and PBR shading characteristics.

Property Description
Albedo Color of the cooled lava crust (RGB). Smoothness is read from the alpha channel.
Smoothness Scale Scales the PBR smoothness of the cold lava surface, affecting its specular reflections.
Normal Map Normal map texture used to add detailed lighting to the cold lava surface.
Rendering

General rendering, depth-handling, and simulation sampling properties.

Property Description
Cull Mode Which triangle faces to discard: Back (default, typical opaque surface), Front (invert), or Off (double-sided; both faces render and lighting uses the correct face normal).
Layer Selects which layer (e.g., Water or Lava, etc.) from the Fluid Simulation field to sample for effects.
Fade Height The world height at which the lava will be fully faded out.
Used to soften edges or blend with geometry above a certain height.
Linear Clip Offset A linear offset applied to the clip-space Z depth
to help prevent visual clipping (Z-fighting) with close terrain or surfaces.
Exponential Clip Offset An exponential/depth-based offset applied to the clip-space Z depth
to help prevent visual clipping (Z-fighting) with distant terrain or surfaces.
Non-Tiled Sampling Hides texture tiling artifacts on the lava albedo, normal and emission by sampling a noise key once and offsetting samples. Slight extra cost.

Particle Shaders

Fluid Frenzy uses custom shaders to render its completely GPU-accelerated particle system. Two shaders are available: ProceduralParticle (Lit) and ProceduralParticleUnlit. Both render particles as billboards.

  • ProceduralParticle (Lit): Includes PBR lighting with support for Normal Maps, Metallic, and Smoothness.
  • ProceduralParticleUnlit (Unlit): Does not perform lighting, offering a lower rendering cost.
  • FluidParticleSplash

All shaders share settings for Blend Mode and Billboard Mode. Billboard Mode controls particle orientation, including options for camera-facing or world-up normals to manage lighting.

Compatibility: The High Definition Render Pipeline (HDRP) requires its own dedicated shaders: FluidFrenzy/HDRP/ProceduralParticle and FluidFrenzy/HDRP/ProceduralParticleUnlit.

Particle Shader

Procedural Particle (Lit) Properties
Property Description
Albedo albedo color and transparency of the particle.
Color albedo color and transparency of the particle.
Normal Map can be used to add extra lighting details.
Alpha Threshold Alpha below this value will be clipped.
Fade Submerged Fades particles that fall below the fluid surface.
Blend Mode select which to use for the particles.
Source Blend Source Blend.
Dest Blend Dest Blend.
ZWrite Write particle to the depth buffer.
Billboard Mode Select which method to use for rendering the particle billboard.

� Camera: the billboard and world normal will face in the direction of the camera.

� Camera Normal Up: the billboard will face the camera and the normal will face in in the world space up direction.This can be useful to have more uniform lighting from every direction.

� Up: the billboard and normal will both face in the world space up direction.

� Normal: not yet implemented.
Smoothness The smoothness of this material.
Metallic The metalness of this material.
Procedural Particle (Unlit) Properties
Property Description
Albedo albedo color and transparency of the particle.
Color albedo color and transparency of the particle.
Alpha Threshold Pixels with transparency below this value are discarded. Higher values increase performance but can make edges look jagged.
Fade Submerged Automatically fades out particles that fall beneath the surface level of the simulated fluid grid.
Blend Mode The mathematical blending operation used to draw the particle onto the screen.
Source Blend The source blend factor used for custom blend modes.
Dest Blend The destination blend factor used for custom blend modes.
ZWrite Whether the particle writes its depth to the Z-Buffer. Usually left off for transparent fluids.
Billboard Mode Controls how the particle faces the camera. ‘Camera Normal Up’ is recommended for proper directional lighting.
Procedural Particle Splash Properties

Custom fluid rendering shader for water splashes.

Splash Particles

Property Description
Atlas Atlas texture driving the fluid shapes. R = Droplets, G = Specular Highlights, B = Aerated Foam, A = Dissolve Noise.
Sprite Sheet Grid The number of columns (X) and rows (Y) in the atlas. The shader will randomly assign a static frame to each particle at birth.
Alpha Multiplier Globally scales the overall opacity of the particles. Higher values make the fluid look thicker and more opaque.
Alpha Threshold Pixels with transparency below this value are discarded. Higher values increase performance but can make edges look jagged.
Droplet Base Color The baseline ambient color of the water droplets.
3D Normal Strength Generates physical volume shading by calculating slopes from the Red channel.
Edge Ring Threshold Controls the internal thickness of the droplet. Lower values make the center thicker.
Edge Ring Softness Controls the blurriness of the droplet’s outer edge. Higher values create a softer look.
Highlight Color The specular color of the light reflecting off the droplets.
Highlight Intensity How bright the specular highlights glow when hit by directional light. Higher values create a glaring, highly reflective surface.
Highlight Focus Controls the size and sharpness of the highlights. Higher values tighten the light into tiny, sharp pinpricks.
White Water Color The color of the internal aeration and foam (driven by the Blue channel).
White Water Opacity How strongly the foam channel blends into the droplet. Higher values fill the droplet, simulating thick, churning white water.
Dissolve Speed How fast the particle physically erodes over its lifetime. A value of 1.2 will fully dissolve the particle exactly as it dies.
Enable Soft Particles Smoothly fades the particle alpha where it intersects with scene geometry to prevent harsh clipping lines.
Soft Particles Fade Distance The physical distance over which the intersection fade occurs. Higher values create a longer, softer fade against walls and floors.
Fade Submerged Automatically fades out particles that fall beneath the surface level of the simulated fluid grid.
Blend Mode The mathematical blending operation used to draw the particle onto the screen.
Source Blend The source blend factor used for custom blend modes.
Dest Blend The destination blend factor used for custom blend modes.
ZWrite Whether the particle writes its depth to the Z-Buffer. Usually left off for transparent fluids.
Billboard Mode Controls how the particle faces the camera. ‘Camera Normal Up’ is recommended for proper directional lighting.

Fluid Decal Shader

Materials for Fluid Decal Renderer use FluidFrenzy/FluidDecal (unlit) or FluidFrenzy/FluidDecalLit (PBR). HDRP projects use Shader Graph variants under FluidFrenzy/HDRP/Decal.

Material Properties

Decal color, textures, and lit surface response. Tiling and offset apply to the decal texture and follow the same UVs as normal and mask maps on FluidDecalLit.

Property Description
Decal Texture RGBA albedo sampled on the fluid surface. Alpha controls transparency.
Tint HDR color multiplier applied to the decal texture.
Normal Map Tangent-space normal map blended with the fluid surface normal. Uses the same UVs and flow mapping as the decal texture.
Normal Strength Scales the normal map before blending with the fluid surface.
Mask Map Optional packed map. Green = occlusion, blue = height (parallax, needs contrast), alpha = smoothness. Uses the same UVs and flow mapping as the decal texture.
Occlusion Strength Blends the green occlusion channel from the mask map.
Metallic PBR metallic value for FluidDecalLit.
Smoothness PBR smoothness multiplier. When a mask map is assigned, smoothness comes from the alpha channel.
Parallax

Optional parallax occlusion mapping from the mask map blue channel.

Property Description
Enable Parallax Uses the blue height channel in the mask map. Adds extra texture samples; off by default.
Height Scale Parallax height scale in texture UV units. Positive: mask blue = raised. Negative inverts the height map.
Rendering

Transparent queue and draw order for the decal pass. The shader defaults to Geometry+512 (render queue 2512) so decals sort after opaque geometry and can be ordered relative to the water surface. Use the material Render Queue field to adjust layering when multiple transparents overlap.