It is a brush that is scattered with colored pieces of transparent glass. 着彩済みの透過ガラス片が散らばるブラシです
It is a brush that is scattered with pieces of glass. Since it is semi-transparent, it can see through the background.
The black and white background is the most beautiful, but other colors are also compatible to some extent.
ガラス片が散らばるブラシです。半透明ですので背景を透過します。
白黒背景が一番綺麗ですが他の色でもある程度対応します。