Why is part of Tenjin's hat transparent? Everything else is solid except for the sliver that is hanging off the back. Why is this transparent?
The headgear is called a Kanmuri and that translucent part is just a thin layer of cloth/mesh attached to the headgear.



http://philippi-collection.blogspot.com/2011/02/headgear-of-japanese-shinto-priests.html