Notch Notch Manual 0.9.23
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Attribute Shading

Attribute Shading

Shades particles based on their current properties.

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Method #

This node colours particles based on an attribute per particle. This is used to shade particles by their own properties, e.g. Tint a particle red as it gets faster, or fade it out as it faces towards the camera.

A Colour Ramp node may be connected to the Colour Ramp input, which is used as a gradient and sampled by the attribute value to generate the outgoing colour.

Parameters

These properties control the 3D transforms of the node. Transforms will generally be inherited by child nodes, although they can be ignored through the Inherit Transform Channels attributes.

ParameterDetails
Position XPosition x in local space
Position YPosition y in local space
Position ZPosition z in local space
Rotation HeadingRotation around y axis in local space
Rotation PitchRotation around x axis in local space
Rotation BankRotation around z axis in local space
Scale XScale along the x axis in local space
Scale YScale along the y axis in local space
Scale ZScale along the z axis in local space

Toggle which transform channels should be inherited from the parent node. By default, all transforms will be inherited.

ParameterDetails
Position XToggle inheritance of the X Position from the parent.
Position YToggle inheritance of the Y Position from the parent.
Position ZToggle inheritance of the Z Position from the parent.
Rotation HeadingToggle inheritance of the Rotation Heading from the parent.
Rotation PitchToggle inheritance of the Rotation Pitch from the parent.
Rotation BankToggle inheritance of the Rotation Bank from the parent.
Scale XToggle inheritance of the X Scale from the parent.
Scale YToggle inheritance of the Y Scale from the parent.
Scale ZToggle inheritance of the Z Scale from the parent.
World Position OnlyInherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties.
Inherit TimeToggle inheritance of time from the parent.

These properties control the core behaviours of the node.

ParameterDetails
ColourChange the colour of the particles as they spawn.
Input ChannelChoose which attribute will be used to control the shader.
  • Velocity X / Y / Z : Shades the particle based on its velocity along a particular axis.
  • Velocity Magnitude : Shades the particle based on the particles absolute velocity.
  • Velocity Along Direction : Shades the particle based on how much its velocity points along the orientation of the shading node.
  • Facing Along Direction : Shades the particle based on how much its facing direction is aligned to the orientation of the shading node.
  • Life : Shades the particle based on the remaining life of the particle.
  • Time : Shades the particle based on the time since birth of the particle.
  • Normalised Life : Shades the particle based on the remaining life of the particle, scaled into 0 to 1 range by the life at birth of the particle.
Attribute ScaleScales the incoming attribute value before using it to generate a colour.
Attribute BiasOffsets the incoming attribute value before using it to generate a colour.
Use Absolute Value (Ignore Sign)Toggle whether to use the absolute value of the incoming value - ignoring the whether the input channel is negative.
Blend ModeChoose how the particle colours blend to the source colours
Blend AmountControl how much the new shading affects the particles.

These properties control the falloff of the particle shading.

ParameterDetails
RadiusOuter radius for which the particles will no longer be coloured.
Inner RadiusInner radius for which the particles will be coloured at their max.
Falloff PowerHow quickly the gradient changes from the inner radius to the outer radius.

Inputs

NameDescriptionTypical Input
Colour RampAn optional colour ramp node to be sampled by the attribute value.Colour Ramp
Affected EmittersChoose which particle emitters can be affected by the affector.Primitive Emitter
Transform ModifierApply the transforms of another node to this node.Null
Target NodeModifiy the rotations of the node to always direct the z axis towards the input.Null
Local Transform OverrideApply the transforms of another node to this node, relative to its parent.Null