Solution for Nested Maps

It’s definitely a feature I’d like to support. Sharing or repeating buildings is a nice use-case, and it would also help with stitching multiple maps together to represent a larger world.

Regarding the image layers, indeed I also think that feature has very little merit. You should actually be using tile objects already, putting your placeholder images in an image collection tileset. Such tilesets can contain individual images of different sizes.

This workaround of using images is rather clever!