Hi! I've ended up exporting the points to a CSV file and build the netCDF outside ArcGIS with a Python script.
Hi,
Yes the voxel layer only supports regularly gridded data so you'll need to use the 3D gridded setting since the input data wasn't gridded.
There's no tool to clip a NetCDF file so you would either have to clip the points themselves before you perform the interpolation and export to NetCDF or use the slice tools available on the Voxel Layer.
https://pro.arcgis.com/en/pro-app/latest/help/mapping/layer-properties/voxel-layer-slices.htm
thanks,
Andrew
For anyone coming to this as of February 25 I have been through Esri support and this has been logged as a bug (BUG-000174333). Specifically this bug relates to the export with custom 3D points feature not working as expected.