Like in this question, I am also talking about that material preview.
Is there a way to have custom material preview objects? In Blender 2.80 and before, there were a bunch of different objects not included in the material preview that are now in 2.81 and later. I.e. the shader ball, fluid material preview, etc.
Can I import objects like these, or other custom objects into Blender for material previews, or use a python script that does this? I really like the new material preview objects in 2.81, and would like to be able to see them in 2.79.
