Massive spatial fields

[LDeakin]

Anari requires data for a structuredRegular spatial field to be supplied as an array. This precludes implementations that support rendering massive volumes by streaming data from disk.

I could see this being addressed by allowing data also to accept a STRING indicating the path to data, where responsibility is left to the implementation to retrieve the data. EDIT: Or a new type of spatial field. Of course, there are many volumetric data file formats, and realistically, there would be little overlap between the formats supported by implementations (if they even support any), so I don't know if it is a good fit for the ANARI API. Thoughts?