Hi Chrissy.
You mentioned a flower pot mask? Have you tried overlapping petals from silk flowers? I don't know if that is how you did your ivy leaves as well. It is an awesome effect, though time consuming if you cover the entire mask. However, select areas such as the eyes and mask border to save time.
Another idea is using ribbons and scraps. Choose solid or mixed colors, metallic, sheer, whatever. The thin ribbons can be attached on the sides. Also, beaded trim glues on quite easily with tacky glue. Fabric scraps can be overlapped and applied with a 1 to 1 Elmer's glue mixture. Even stickers work great in a pinch.
My favorite is bleed resistant tissue paper. Apply it with diluted Elmer's. You can overlap, wrinkle, make swirls, whatever. Just apply it like decoupage. I suggest Elmer's because it can be painted on. Add spray glitter for a real quickie. Wally World (a/k/a Wal Mart for the benefit of the viewers) has it in the craft section.
I will also suggest taking several of these plastic masks and using them as forms. In other words, use the tissue or fabric dipped in Liquid Starch. Stick directly to the plastic on top. Blow dry them or leave overnight. When dried, just pop them off. Only used the liquid starch for this process, not the glue. Sta Flo Liquid Starch is also available at Wally World or Winn Dixie, at least in my area. You can trim them when dry.
Hope this helps.
Rozani