Mesh Attribute Weight
Updated: 23 Sep 2025
Generates weight values using attributes sampled from a mesh, at the closest point on the mesh to the particle.
Mesh Attribute Weight
Method #
This node generates a per-particle weight values using attributes sampled from a mesh. These can then be used to vary the strength of affectors on the parent particle system.
The output from this node are particle weights which are unique to the parent particle system, so can’t be used to influence other particle systems.
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
The objects position along the local x-axis.
Position Y
The objects position along the local y-axis.
Position Z
The objects position along the local z-axis.
Rotation Heading
The objects rotation around the local y-axis.
Rotation Pitch
The objects rotation around the local x-axis.
Rotation Bank
The objects rotation around the local z-axis.
Scale X
The objects scale along the local x-axis.
Scale Y
The objects scale along the local y-axis.
Scale Z
The objects scale along the local z-axis.
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 Input Channel
Choose which attribute to use to generate the weight.
- Distance From Surface : Generates the weight based on the particles distance from the surface of the mesh.
- UV X : Generates the weight based on the X value of the object’s UV coordinates.
- UV Y : Generates the weight based on the Y value of the object’s UV coordinates.
- Weightmap Value : Generates the weight based on a generated weightmap applied to the input object.
Use Absolute Value (Ignore Sign)
If value is negative, make it positive.
Attribute Scale
Scale the value of the selected attribute.
Attribute Bias
Offset the value of the selected attribute.
Invert Value
Invert the value of the selected attribute.
Radius
TBC
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 | The objects position along the local x-axis. |
| Position Y | The objects position along the local y-axis. |
| Position Z | The objects position along the local z-axis. |
| Rotation Heading | The objects rotation around the local y-axis. |
| Rotation Pitch | The objects rotation around the local x-axis. |
| Rotation Bank | The objects rotation around the local z-axis. |
| Scale X | The objects scale along the local x-axis. |
| Scale Y | The objects scale along the local y-axis. |
| Scale Z | The objects scale along the local z-axis. |
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 |
|---|---|
| Input Channel |
Choose which attribute to use to generate the weight.
|
| Use Absolute Value (Ignore Sign) | If value is negative, make it positive. |
| Attribute Scale | Scale the value of the selected attribute. |
| Attribute Bias | Offset the value of the selected attribute. |
| Invert Value | Invert the value of the selected attribute. |
| Radius | TBC |
| Name | Description | Typical Input |
|---|---|---|
| Object | Object to generate attribute weight from. | 3D Object |
| Weightmap | Weightmap to use to generate particle weights when using “Weightmap Value”. | Generate Weightmap |
| 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 |