Null To Weightmap
Updated: 10 Feb 2025
Converts a position to a weightmap
Null To Weightmap
Method #
This deformer node uses the distances from a set of input Nulls, or a transform array, to generate per-vertex or per-polygon weightmap for the parent mesh. These can then be used to vary the strength of Deformers on the parent mesh.
The output from this node is a vertex weightmap which is unique to the parent mesh, so can’t be used to influence other meshes.
Node placement is important! Weightmaps are generated following the deformer processing stack, so make sure to place the weightmap at some point before the deformer its applied to.
Parameters
These properties control the core behaviours of the node.
Parameter Details Apply Mode
Choose whether the weightmap applies to the individual vertices or the mesh chunks.
- Vertices : The generated weightmap is applied to the mesh vertices.
- Chunks : The generated weightmap is applied to the separated mesh pieces.
Max Radius
The falloff radius from each null.
Per-Polygon Weightmap
Determines whether the weightmap should specify a value per-polygon or per-vertex.
Gain
Scale the generated value.
Offset
Offset the generated value.
Sharpness
Ramps the sharpness of the generated value to a power.
Min Value
Limit the minimum value generated.
Max Value
Limit the maximum value generated.
Invert
Invert the generated weightmap values.
Show Weightmap
Visualise the weightmap as vertex colours on the source geometry
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Apply Mode |
Choose whether the weightmap applies to the individual vertices or the mesh chunks.
|
| Max Radius | The falloff radius from each null. |
| Per-Polygon Weightmap | Determines whether the weightmap should specify a value per-polygon or per-vertex. |
| Gain | Scale the generated value. |
| Offset | Offset the generated value. |
| Sharpness | Ramps the sharpness of the generated value to a power. |
| Min Value | Limit the minimum value generated. |
| Max Value | Limit the maximum value generated. |
| Invert | Invert the generated weightmap values. |
| Show Weightmap | Visualise the weightmap as vertex colours on the source geometry |
| Name | Description | Typical Input |
|---|---|---|
| Nulls | The geometry nulls used to define the weightmap. | Null |
| Falloff Node | Use an input node to control the transformation values of the falloff. | Null |
| Generated Weightmap | Add a weightmap to vary the strength of the deformer across the surface. | Generate Weightmap |
| 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 |