I found this in the user gallery:
The artists states he used B-Maxwell with v3...Take a read. I asked him on the Blender artists forum how he did this. I am under the impression the B-Maxwell add-on is still not ready for v3. Maybe he is testing it. Who knows.
I want to upgrade. I am itching to upgrade.....I almost did today. I was going to give in and try it with Form-Z...But I held out.