Lighting
Updated: 4 Dec 2023
Shades particles based on the area of effect from lights.
Lighting
Method #
This node shades particles based on scene lighting. The lighting calculation is an approximation based on the particle’s distance to the light and its facing direction, which is determined by either the particle’s normal if available or the orientation of the camera, giving a specular-like result. The Facing Direction Amount parameter controls the weighting of the facing direction effect so it can be blended out, leaving only the attenuation distance to generate the lighting effect.
Shadows cast between particles are not calculated by this node. To calculate shadows from particles use either the Volume Shadow Shading or Voxel Cone Shading nodes.
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.
Parameter Details Position X
Position x in local space
Position Y
Position y in local space
Position Z
Position z in local space
Rotation Heading
Rotation around y axis in local space
Rotation Pitch
Rotation around x axis in local space
Rotation Bank
Rotation around z axis in local space
Scale X
Scale along the x axis in local space
Scale Y
Scale along the y axis in local space
Scale Z
Scale along the z axis in local space
Control the inheritance of the transforms from the parent.
Parameter Details Position
Toggle inheritance of the Position from the parent.
Rotation
Toggle inheritance of the Rotation from the parent.
Scale
Toggle inheritance of the Scale from the parent.
World Position Only
Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties.
Inherit Time
Toggle inheritance of time from the parent.
These properties control the core behaviours of the node.
Parameter Details Facing Direction Amount
Weighting of the facing direction calculation as part of the lighting effect.
Facing Angle Range
The angle range of the facing direction calculation: larger values produce a softer result.
Blend Mode
Choose how the particle colours blend to the source colours
Blend Amount
Control how much the new shading affects the particles.
Inputs
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.
| Parameter | Details |
|---|---|
| Position X | Position x in local space |
| Position Y | Position y in local space |
| Position Z | Position z in local space |
| Rotation Heading | Rotation around y axis in local space |
| Rotation Pitch | Rotation around x axis in local space |
| Rotation Bank | Rotation around z axis in local space |
| Scale X | Scale along the x axis in local space |
| Scale Y | Scale along the y axis in local space |
| Scale Z | Scale along the z axis in local space |
Control the inheritance of the transforms from the parent.
| Parameter | Details |
|---|---|
| Position | Toggle inheritance of the Position from the parent. |
| Rotation | Toggle inheritance of the Rotation from the parent. |
| Scale | Toggle inheritance of the Scale from the parent. |
| World Position Only | Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties. |
| Inherit Time | Toggle inheritance of time from the parent. |
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Facing Direction Amount | Weighting of the facing direction calculation as part of the lighting effect. |
| Facing Angle Range | The angle range of the facing direction calculation: larger values produce a softer result. |
| Blend Mode | Choose how the particle colours blend to the source colours |
| Blend Amount | Control how much the new shading affects the particles. |
| Name | Description | Typical Input |
|---|---|---|
| Affecting Lights | The light nodes used to calculate lighting on the particles. | Light |
| Affected Emitters | Choose which particle emitters can be affected by the affector. | Primitive Emitter |
| Transform Modifiers | Apply the transforms of another node to this node. | Null |
| Target Node | Modifiy the rotations of the node to always direct the z axis towards the input. | Null |
| Local Transform Override | Apply the transforms of another node to this node, relative to its parent. | Null |