volume-rendering

I don't think this is a duplicate ticket, even though it's quite an obvious feature after that cat demo at SciPy2018.

The code that selects and renders the different geos is here in the THREE.js code
https://github.com/maartenbreddels/ipyvolume/blob/master/js/src/scatter.js#L57

I don't know quite where/how to inject the mesh definition compatible with the data file of this form, but i

The vdb_print binary is missing support for VDB Point grids. This would be super useful. Some recommended functionality:

• total/active/inactive point count
• attribute name, type, uniform, index, flags, compression information
• group name and count information
• whether the descriptor is shared (option to print out all descriptors which differ?)

I suggest that this is only implemented f

See the following warnings printed when importing a dataset:

• UnityVolumeRendering.VolumeDataset must be instantiated using the ScriptableObject.CreateInstance method instead of new VolumeDataset. (at Assets/Scripts/VolumeData/VolumeDataset.cs:33)
• UnityVolumeRendering.TransferFunction must be instantiated using the ScriptableObject.CreateInstance method instead of new TransferFunction. (