VolumeWranglers are invoked for each Voxel in a HeightField and so already have access to that voxel. Is there a way to read the height of a neighbourning voxel.

Thanks
Clff

To access neighbors, you need to calculate their positions relative to the current one. Since voxels are on a grid, you do this by offsetting the voxel coordinates. Houdini provides the volumeindex VEX function [www.sidefx.com] to help you read values from a volume at specific voxel coordinates.

You can do it using:

Thank you both. I now have it working.

Cliff