Glitter / Sparkle
The Glitter feature is a simple effect that adds a voronoi-based sparkle to the color of the mesh. It can be used to add a sparkle to a mesh, or to simulate specular lighting on a glittery surface.
Glitter / Sparkle received a complete rewrite as of Poiyomi 9.0. Therefore, some features have been changed and reorganized.
UV
Type: Dropdown, Options:UV0/UV1/UV2/UV3/Panosphere/World Pos/Local Pos/Polar UV/Distorted UV
Which UV to project the glitter effect on.
The UV used for this should be relatively even for the glitter effect to not be distorted. If the UV is distorted, the glitter effect will be distorted. For example, if part of the mesh is projected larger than the rest, the glitter effect will be larger in that area.
Mode
Type: Dropdown, Options:Angle/Linear Emission/Light Reflections
Which mode to use for glitter.
Angle: The glitter effect is masked according to the angle between the view direction and the normal of the mesh. This threshold is controlled by the Glitter Angle Range Property.Linear Emission: The glitter effect is emitted in a linear fashion, with all areas of the mesh having an equal amount of glitter.Light Reflections: The glitter effect is masked by the specular reflection of the mesh. The size of the effect is controlled by the Glitter Angle Range Property. Glitter in this mode will always be hidden in dark areas of the mesh, as there's no light to reflect off of.
Shape
Type: Dropdown, Options:Circle/Square
What shape to use for the glitter effect, within each Voronoi cell. The shape can only be seen when Glitter Size is set low enough to not take up the entire cell.
Blend Mode
Type: Dropdown, Options:Add/Replace
How the glitter should be blended with the base color.
Add: The glitter effect is added to the base color. Generally results in a brighter effect.Replace: The glitter effect replaces the base color. Generally results in a richer effect.
Use Normals
Type: Float, Range:0.0 - 1.0
At 0, only vertex normals are taken into account when calculating glitter. At 1, normal maps (pixel normals) are also taken into account at full strength. Values in between blend.
Layers
Type: Integer, Range:1 - 4
How many layers of the glitter effect should be applied.
Shape & Color
Shape Texture
Type: Color Texture (sRGB ON)
Texture to use for the individual glitter particles. These particles are placed in each voronoi cell. The glitter texture should generally be used with large glitter particles (smaller Glitter Density).
Color Map
Type: Color Texture (sRGB ON)
Map of what color the glitter should be in different areas of the mesh. This offers more control over the glitter color.
Color
Type: HDR Color
Base color used for the glitter effect. This color is an HDR color, meaning it can have an intensity applied to make the color brighter than normal colors.
Use Base Color
Type: Float, Range:0.0 - 1.0
How much to blend the surface color with the glitter color. This creates a somewhat metallic effect. A value of 1.0 will result in the Color being completely replaced by the surface color.
Random Color
Type: Boolean
Applies random colors to glitter.
Saturation Range
Type: Multislider, Range:0.0 - 1.0
The saturation range of the randomly generated glitter colors.
Brightness Range
Type: Multislider, Range:0.0 - 1.0
The brightness range of the randomly generated glitter colors.
Position & Size
Glitter Density
Type: Float
How dense the glitter should be. This represents the number of voronoi cells that should bne along the edge of the mesh UV. Reasonable values are generally between 250 and 1000, but can vary significantly.
Glitter Size
Type: Float, Range:0.0 - 1.0
How much the glitter should occupy the voronoi cell. At 0.0, the glitter will be totally invisible. At 1.0, the glitter will completely fill the cell, making the borders of the cell visible.
Panning
Type: Vector2
How fast the glitter particles should move across the Glitter UV. This is a 2D vector, with the X and Y values defining the speed in the X and Y directions.
Random Position
Type: Boolean
Applies random positional offset to glitter.
Random Size
Type: Boolean
Applies random size to glitter.
Size Range
Type: Multislider, Range:0.0 - 1.0
The size range of the glitter. Overrides 'Glitter Size'.
Sparkle Control
Glitter Min Brightness
Type: Float, Range:0.0 - 1.0
Minimum brightness level for the glitter. At 0, the glitter will be completely invisible. At 1, the glitter will always have the maximum brightness.
Glitter Max Brightness
Type: Float, Range:0.0 - 40.0
Maximum brightness level for the glitter. At 0, the glitter will always be completely invisible.
Speed
Type: Float
How fast the the glitter should "flicker", or cycle between bright and dark. Higher values will result in a faster flickering effect.
Dim Light
Type: Float, Range:0.0 - 1.0
How much to "dim" the glitter effect, which shrinks it from taking up the entire voronoi cell. At 0, the glitter will be completely visible. At 1, the glitter will be very small.
Only visible when Mode is set to Linear Emission.
Glitter Angle Range
Type: Float, Range:0 - 90
Range to limit the angle of the glitter effect. Smaller values will create a tighter glitter pattern.
Only visible when Mode is set to Angle or Light Reflections.
Glitter Bias
Type: Float, Range:0.0 - 1.0
How much to bias the glitter brightness. At 0, the glitter will be completely dark. At 1, the glitter will always have the maximum brightness. This works similarly to the Glitter Contrast Property.
Only Visible when Mode is set to Angle.
Post Contrast
Type: Float, Range:1 - 1000
How much contrast the glitter should have. At lower values, the cells will all have a similar brightness. At higher values, cells will have increasingly different brightness levels.
Only visible when Mode is set to Angle or Light Reflections.
Distant Jaggy Fix
Type: Float, Range:0.0 - 0.1
How much to apply a fix for jagged edges of square glitter. Slightly rounds the corners of the glitter cells.
Only visible when Shape is set to Square.
Rotations
Random Offset
Type: Boolean
Applies random rotation offsets to glitter cells.
Constant Speed
Type: Float
How fast the glitter particles should rotate within the voronoi cell. This is only visible with glitter set to Square, or glitter that uses a Texture.
Random Speed Range
Type: Vector2
Applies a constant, randomly selected rotation speed to each cell, meaning each individual cell will have a consistent rotation speed.
Masking & Light Masking
Glitter Mask
Type: Data Texture (sRGB OFF)
Mask texture that defines what areas of the mesh should have glitter. Black areas will not have glitter, while white areas will.
Hide in Shadow
Type: Float, Range:0.0 - 1.0
How much to hide the glitter in shadow. At 0, the glitter will be completely visible in shadow. At 1, the glitter will be completely invisible in shadow.
Scale with Lighting
Type: Float, Range:0.0 - 1.0
Increasing this value will scale the brightness of the glitter based on the intensity of scene lighting.
Global Mask
Type: Dropdown, Options:Off/1R/1G/1B/1A/2R/2G/2B/2A/3R/3G/3B/3A/4R/4G/4B/4A
Select which Global Mask to use to mask the Glitter effects.
Hue Shift
Type: Boolean
Enables or Disables the Hue Shift effect for glitter.
Color Space
Type: Dropdown, Options:OKLab/HSV
Choice of Color Space to use for the Hue Shift. By default, it will be set to OKLab.
Learn about the difference of Color Spaces as documented here in Color Adjust.
Shift Speed
Type: Float
How much to constantly shift the hue with time. A value of 1 will result in a full hue shift cycle every 20 seconds.
Hue Shift
Type: Float, Range:0.0 - 1.0
How much to shift the base color around the hue circle. This value is circular, and will have the same result at 0 and 1.
AudioLink
Type: Boolean
Enables or Disables AudioLink effects for Glitter.
This section allows control of the Glitter through AudioLink. It will only be exposed when AudioLink is activated on the Material.
Alpha Band
Type: Dropdown, Options:Bass/Low Mid/High Mid/Treble
Selects which audio band should be used to modulate glitter alpha.
Alpha Mod
Type: Vector2
Configures by how much glitter alpha should be modulated when the selected band gets triggered. 'Min' specifies alpha at rest, 'Max' specifies alpha at full activation.
Max Brightness Band
Type: Dropdown, Options:Bass/Low Mid/High Mid/Treble
Selects which audio band should be used to modulate glitter max brightness.
Max Brightness Mod
Type: Vector2
Configures by how much glitter max brightness should be modulated when the selected band gets triggered. 'Min' specifies max brightness at rest, 'Max' specifies max brightness at full activation.
Size Band
Type: Dropdown, Options:Bass/Low Mid/High Mid/Treble
Selects which audio band should be used to modulate glitter size.
Size Mod
Type: Vector2
Configures by how much glitter size should be modulated when the selected band gets triggered. 'Min' specifies the size at rest, 'Max' specifies the size at full activation.
Chrono Sparkle Type
Type: Dropdown
Determines how chronotensity is applied to sparkle speed.
Chrono Sparkle Band
Type: Dropdown, Options:Bass/Low Mid/High Mid/Treble
Selects which audio band should be used to drive chronotensity sparkle speed.
Chrono Sparkle Speed
Type: Float
Determines how much sparkle speed will be modulated as a function of chronotensity.
Chrono Rotation Type
Type: Dropdown
Determines how chronotensity is applied to sparkle texture rotation.
Chrono Rotation Band
Type: Dropdown, Options:Bass/Low Mid/High Mid/Treble
Selects which audio band should be used to drive chronotensity sparkle texture rotation.
Chrono Rotation Speed
Type: Float
Determines how much sparkle rotation speed will be modulated as a function of chronotensity.