Occlusion Weightmap
Updated: 10 Feb 2025
Generates a weightmap from concave areas in the mesh
Occlusion Weightmap
Method #
This node genreates per-vertex or per-polygon weightmap based on the concave areas of 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 deformer applies to the individual vertices or the mesh chunks.
- Vertices : The mesh deformations are applied to the mesh vertices.
- Chunks : The mesh deformations are applied to the separated mesh pieces.
Per-Polygon Weightmap
Determines whether the weightmap should specify a value per-polygon or per-vertex.
Output Vertex Colours.
Output the weightmap values as colour onto the input object.
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
These properties control where the deformer affects the geometry.
Parameter Details Enabled
Enable falloff from the position of the deformer.
Shape
Select which shape to use to draw falloff from.
- Sphere : Falloff is drawn outward from a central point, forming a spherical falloff.
- Cylinder : Falloff is drawn outward from a line, forming a cylindrical falloff.
- Plane : Falloff is drawn outward from a plane.
Shape Orientation
Along which axis the shape should be drawn.
Outer Range
The outer range from which the falloff is calculated from.
Inner Range
The inner range from which the falloff is calculated from.
Curve Power
How quickly the falloff drops to 0 at the outer falloff.
Invert
Invert the direction of the falloff.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Apply Mode |
Choose whether the deformer applies to the individual vertices or the mesh chunks.
|
| Per-Polygon Weightmap | Determines whether the weightmap should specify a value per-polygon or per-vertex. |
| Output Vertex Colours. | Output the weightmap values as colour onto the input object. |
| 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 |
These properties control where the deformer affects the geometry.
| Parameter | Details |
|---|---|
| Enabled | Enable falloff from the position of the deformer. |
| Shape |
Select which shape to use to draw falloff from.
|
| Shape Orientation | Along which axis the shape should be drawn. |
| Outer Range | The outer range from which the falloff is calculated from. |
| Inner Range | The inner range from which the falloff is calculated from. |
| Curve Power | How quickly the falloff drops to 0 at the outer falloff. |
| Invert | Invert the direction of the falloff. |
| Name | Description | Typical Input |
|---|---|---|
| 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 |