Thank you ^^
Figuring out animated stickers rendering in hint/dialogue messages for Plazma Burst 3 as I'm writing this comment ^
Sending stickers is already possible in Plazma Burst 2 H5 ^
There is support for character emoting actually in Plazma Burst 3. They use same physical approach like death animations so they can be played in any position.
Those are separate from animated stickers though - stickers are images in chat messages. Such as loading circle one for example, I haven't really made any animated stickers so far - just implemented engine support for those.