Rough drafts for the ice hissi (#20) were first created in November 2009, and the set was initially finished with 36 Hissis by the creation of the UC faerie hissi (#36) in February 2010.
I have made custom versions of these hissis for people over the years; some are just clothes-swaps of two existing adoptables, but some have original designs.
- BONUS MATERIAL - As proud as I was with my set of transparent versions when I made them in July 2012, I made this tiny infographic for them.
Here is a "Making of..." progress animation I made for the faerie version. Its wings greatly benefited from the use of wing references and understanding the mechanics of them, as opposed to "winging it" as I almost did. As you can tell, I did not consider typing out my comments in the gif.