As you probably know, BMD added a nice Extrude3D node which opens up more possibilities. I focus on Hexagons here because of the nice patterns it can create. I do wish there would be Global Illumination in the normal Renderer3D....If you're interested in a tutorial, let me know!
In the meantime, I'll make some project files available on my Patreon.
/ ablackbirdcalledsue