Hey I extended my map tool, now you can extend layers to the left and up (all by the same amount of tiles), without the look of the map changing. This should be useful because in the editor its only supported to extend layers to the bottom and to the right
The source code is here https://gitlab.com/Patiga/twmap/, and currently you would need to build the project yourself to use it. But if you just send me the map I can just quickly run the tool for you.
I hope to make the tool more accessible in the future, maybe integrate it into the DDNet discord bot for easier access in the testing channels. If you yourself think that this would be helpful, please leave a reaction or smth