I'll be working on this stuff forever...
7 Sep 22: A small addition
I wasn’t quite satisfied with the bases, I felt they needed just something a little more, and tufts sprang to mind. I’ve seen those cool “alien world” tufts and was planning on grabbing some eventually. But I was in my FLGS and saw the Gamers Grass Laser Plants Alien Rosettes and figured I’d give them a go.
They’re quite interesting. Pluck them from the sheet, bash them up a little bit to give them more dimension and super-glue them down. On the Gamma above, I built the rosette in three layers, sticking each down and allowing it to dry before adding the next layer.
For this one I used only a single piece. It adds a touch of life to the base without being over the top. 
Congratulations @rayzryr the figures look fantastic.
Thank you @zorg ?