Grid Dilate & Erode Node

The Grid Dilate & Erode node expands or contracts the active regions of a volume grid. It modifies which voxels are considered active, without changing the stored voxel values.

This operation is commonly used to grow or shrink volume regions, fill small gaps, remove noise, or adjust boundaries in volumetric data.

Properties

Data Type

The type of data stored in the grid (e.g. Float, Integer, Boolean, Vector). Must match the type of the input grid.

Inputs

Grid

The input volume grid whose active voxels are modified.

Connectivity

Defines which neighboring voxels are considered connected during the operation.

Face:

Use 6-connectivity, affecting only voxels connected by faces.

Edge:

Use 18-connectivity, affecting voxels connected by faces or edges.

Vertex:

Use 26-connectivity, affecting voxels connected by faces, edges, or vertices.

Tiles

Controls how active tiles are handled during dilation or erosion.

Ignore:

Ignore active tiles entirely. Tiles are neither modified nor contribute to the operation.

Expand:

Convert active tiles to individual voxels, apply the operation, and leave the result fully voxelized.

Preserve:

Keep tiles unchanged when possible, only voxelizing when necessary. This option is more memory efficient.

Steps

Number of times to apply the dilation or erosion operation. Higher values increase the distance the active region is expanded or contracted.

Outputs

Grid

The resulting grid with updated active voxel regions.