For loading the data, Seb recommended that we use a single https://vtk.org/doc/nightly/html/classvtkTIFFReader.html instance and call `SetFileNames`. For the actual rendering, he suggested we look at this example: https://examples.vtk.org/site/Python/VolumeRendering/SimpleRayCast/. There are some minor changes we need to make to our Docker setup as a part of this, as well, though @dugganjw will handle those (possibly adding a commit to the MR here or in a separate issue).