QUOTE(Okey_Dokey @ Dec 17 2018, 10:17 PM)

Modding Tetris Online Poland is pretty complicated. riisssaaa once wrote a
guide in the Tetris Online Poland forums.
It's not *that* complicated.
You use SJE tool to unpack from a proprietary TOP format back into jpeg and png. Make modifications, then use SJE Tool to pack it back into the TOP format.
The guide that riisssaaa wrote is very comprehensive
