This document describes how to use HDRP Volume Post-Process Pack (hereafter "This package").

• Demo Scenes
• About Volume Post-Process framework
• Setup
  • 1. Create Volume GameObject in your scene
  • 2. Set a preset "Profile" or Create a new one
  • 3. Edit Effect ordering
• Effects
  • Advanced Vignette
    • Main Properties
    • Mask Vignette mode properties
    • Surface Texture setting
  • Flexible Noise Edge
    • Usage
    • Create your Flexible Noise Edge effect from scratch
    • Properties
      • Property Section 1. Blank Setting
      • Property Section 2. Surface Texture
      • Property Section 3. Noise Texture
  • Noisy Distortion
    • Properties
      • Property Section 1. Noise Generation Setting
      • Property Section 2. Runtime Generation Setting
      • Property Section 3. Blank Setting
  • Gaussian Blur
    • Properties
  • Analog TV
    • Properties
  • Sketch
    • Properties
  • Simple Ripple
    • Properties
      • Autoplay Setting
  • Water Surface
    • Properties
  • Concentration Line
    • Properties
      • Noise Generation Setting
  • Ordered Dithering
    • Properties
  • Kuwahara Filter
  • Grayscale
• Using in Timeline
  • 1. add track to timeline asset
  • 2. add Playable Asset to the track
  • 3. link Volume to track
  • 4. Edit animation
    • Tips
• Trouble Shooting
  • Any effects are NOT visible on the screen

Demo Scenes

Demo scenes in this package require the project derived from 3D Sample Scene (HDRP) .

About Volume Post-Process framework

This package is based on Volume framework.
Please refer to the following link.

https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@12.1/manual/Volumes.html

Setup

1. Create Volume GameObject in your scene

Click the "+" button of the left top of a hierarchy view, and select

Volume > Global Volume

A GameObject will be created and that has a Volume component.
View that in a Inspector view.

The Mode property defines the range of influence of the effect.

When Global, it renders effects anywhere.
When Local, it renders effects if a main camera is inside the collider of the volume GameObject.

2. Set a preset "Profile" or Create a new one

Volume component needs one Profile that define how to render the scene.

This package contains various preset profiles so you can use these immediately to add a single Post Process.

Click Profile field and select a profile from the list.

3. Edit Effect ordering

Open project setting window from Unity menu

Edit > Project settings…

The setting window will open, so select the HDRP Global Settings section in left side.

Scroll right pane down and find the After Post Process section of Custom Post Process Orders.

Click the "+" button of right down of the section, and select the post process name you added to the Volume GameObject.

This step is a must!
Don't forget to process above step on each Post Process.

link:
https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@12.1/manual/Custom-Post-Process.html#effect-ordering

Effects

icon means the property can be modified by Timeline.

Advanced Vignette

Multifunctional Vignette.

Main Properties

Property	Description
masterVolume	effects the overall effect amount.
Intensity	vignette intensity. mainly effects the radius of vignette. determine the upper limit of blank radius (multiply by masterVolume).
Type	type of vignette. refer next section.
Gradation Power	how the gradient is applied
Center UV	vignette center position in UV coordinates
Aspect Ratio	aspect ratio of the vignette blank
Color	vignette color

Mask Vignette mode properties

Type property determines vignette execution type.

• Procedural
  simple circle vignette
• Simple Mask
  mask by texture
• Mixed Mask
  mixing circles and textures

Simple Mask or Mixed Mask mode has more specific properties.

Property	Description
Mask Texture	texture used as vignette mask
Rotation	blank rotation
Inverse Alpha	inverse alpha value of Mask Texture
Scale	mask blank scale
Mask Reduction Ratio	blank reduction factor proportional to intensity

Surface Texture setting

a texture you want can be overrided

Property	Description
texture	a texture to override
Texture Scroll Vector	simple scroll vector
Texture Color	added to texture surface color
Use Texture Alpha	use alpha value of the texture. if toggled of, alpha value can be determine by slider
Texture Scale	texture scaling
Texture Offset	offset
Offset Time	texture scroll offset

Flexible Noise Edge

This is one of the most variable effect of this package.

Blend textures and render complex effects.

Usage

This effect need a FlexibleNoiseSetting asset derived from ScriptableObject.
This package contains some preset assets, so at first you set one of them to the volume and check how it works.

Click "preview" button to play the effect preview on Unity editor without entering play mode.

Create your Flexible Noise Edge effect from scratch

Click "New" button of the volume, and select the file path to save a new asset.

Properties

Property Section 1. Blank Setting

Define blank space of this effect.
Same to Advanced Vignette.

Property Section 2. Surface Texture

Main surface of the effect.
Prepare a texture that shows the looping pattern.

Property	Description
texture	a texture to override
Texture Scroll Vector	simple scroll vector
Texture Color	added to texture surface color
Use Texture Alpha	use alpha value of the texture. if toggled of, alpha value can be determine by slider
Texture Scale	texture scaling
Texture Offset	offset
Offset Time	texture scroll offset
Surface Threshold	alpha value to judge for blending color of the surface
Edge Threshold	alpha value to judge for blending color of the edge
Edge Color	blend color for the pixel that has alpha value below the Edge Threshold

Property Section 3. Noise Texture

This texture uses only alpha value.
Blend that with surface and make random opacity.

Noisy Distortion

Distorts the image according to the noise texture.

Properties

Property Section 1. Noise Generation Setting

This effect needs a special texture created from Height map. Creation process will be executing inside Unity editor when the "Generate Noise Map" button clicked.
These property are used only in Editor.

When any height map not set, parlin noise will be used automaticaly. So you can setup this effect with no height map.

** about height map ** https://docs.unity3d.com/Manual/StandardShaderMaterialParameterHeightMap.html

Property	Description
Source Height Map	a source texture used by noise texture creation process.
Output Texture Size	output texture size
Bake Noise Scale	output texture scale of detail
Noise Roughness Magnification	setting a bigger value results in a large slope in a output noise texture

Property Section 2. Runtime Generation Setting

These properties effects runtime rendering.

Property	Description
Intensity	Noise appearance strength
Runtime Noise Scale	noise texture scaling
Runtime Noise Vector	scroll vector
Trancate Noise Value	a pixel in the noise texture that has alpha below this threshold will not be distorted

Property Section 3. Blank Setting

These properties defines blank space in the center of the effect.
Same to Advanced Vignette.

Gaussian Blur

Gaussian blur is completed by setting the two effects, vertical and horizontal, in sequence.

Properties

Property	Description
Intensity	blur strength
Sample Count	sampling pixel count
Sample Interval	sampling pixel distance
Standard Deviation	weight calculation parameter
Brightness	brightness adjustment parameter

Analog TV

Properties

Property	Description
Master Volume	master volume
Line Count	scan line count
Chromatic R	shift red pigment
Chromatic G	shift green pigment
Chromatic B	shift blue pigment
Speed	line move speed

Sketch

Properties

Property	Description
Intensity	Outline and surface color intensity
Normal Base Outline Intensity	outline intensity calculated using normal vector
Depth Base Outline Intensity	outline intensity calculated using depth (G-Buffer)
Outline Color	outline color
Surface Color	surface color
Surface Intensity	surface color intensity

Simple Ripple

Properties

Property	Description
Master Volume	maseter volume
Intensity	Ripple intenisty. if autoplay enabled, this value defines whole effect ripple power
Frequency	number of overlapping ripples
Propagation	propagation of ripple (use in scripting or timeline)
Ripple Center UV	center position of ripple

Autoplay Setting

Property	Description
Ripple Speed	propagation speed
Ripple Spread Time	time to fade out

Water Surface

Properties

Property	Description
Intensity	intensity
Layer Count	number of water layer
Ripple Brightness	ripple brightness
Surface Brightness	brightness of colored surface
Seed 1	water movement seed 1
Seed 2	water movement seed 2
Mesh Detail	surface fineness
Color	surface color

Concentration Line

Properties

Property	Description
Intensity	line intensity
Line Frequency	number of line
Center Viewport In Screen	center position
Blank Radius	center blank radius
Color Threshold	alpha threshold to render line
Blank Aspect	aspect ratio of center blank
Line Rotation	rotation of the entire effect
Auto Rotation Speed	auto rotate in play mode if this value is set
Line Randomize Offset	offset time to randomize lines
Auto Randomize Speed	randomize in play mode if this value is set
Line Color	effect line color

Noise Generation Setting

This effect uses a texture that contains alpha channel, and that must be created before executing.
In easy use, check the "Runtime Generation" toggle to create noise texure automatically in play mode.

Ordered Dithering

Reduce the number of colors to create a retro look.

Properties

Property	Description
Intensity	effect intensity
Ordered Matrix Size	pixel matrix size to calculate
Color Step	color step in rendering
Dither Threshold	threshold to clip

Kuwahara Filter

Filter to make the screen look like an oil painting image.

Grayscale

Using in Timeline

All effects in this package can be modified from Timeline sequence.

About detail to use Timeline, please refer official reference.

1. add track to timeline asset

in the Timeline Window, click "+" button and add target Track by each effect.

2. add Playable Asset to the track

right click the track, and click Add *** Playable Asset.

3. link Volume to track

Drag and Drop a volume GameObject in a scene from Hierarchy view to created track.

4. Edit animation

edit animation clip like any other timeline components

Tips

if your animation curve looks invalid scale,

↓ click the track and set focus, and type f key

Trouble Shooting

Any effects are NOT visible on the screen

Check the Edit Effect ordering and ensure that the effect you want to use is set.

If the Mode property of the volume is set to Local, any effects only be rendered if a main camera is in the collider of the volume GameObject.