Hello all scientific visualization people interested in photorealistic rendering!
I’ve been upgrading this amazing add-on for Blender >2.80 called BVTKNodes, originally created by Silvano Imboden and further developed by Lorenzo Celli for Blender 2.79. BVTKNodes makes it possible to create and execute VTK pipelines configured in Blender Node Editor, to produce surface mesh objects, which can be then visualized in Blender using it’s rendering engines. This makes it possible to create photorealistic images and animations of scientific data in Blender (provided that you know both Blender and VTK well enough!). For more information, have a look at https://bvtknodes.readthedocs.io
PS. More images at https://blenderartists.org/t/bvtknodes-gallery/1161079