[Paraview] Best file format for volume rendering in ParaView?

[Christoffer Green]

Hello

What are your thoughts on the best file format to use when doing volume
rendering in ParaView?

I have been trying out the ensight format and the vtk format and find them
less then ideal, is there anything better?

Findings for ensight:
ParaView does not appear to support volume rendering of ensight files due
to it not supporting volume rendering of multi-block datasets and the
ensight reader always imports things in multi block mode. There are ways to
get around this (tetrahedralize together with calculator filter) but the
end results appear to be extremely slow when volume rendering.

Findings for vtk:
Importing a volume of data as image data and volume rendering it works well
but image data in the vtk format must always be aligned to the global
orthogonal (x, y, z) axes so it cannot be rotated. Since we have multiple
data files that all must be positioned and rotated in a scene (MRI volumes
and image planes) this makes things uncomfortable. There is a transform
filter in ParaView but after applying it to image data it changes the data
type to curvalinear grid which ParaView cannot volume render.


What are the alternatives?

BR/ Christoffer
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