Guide on adding objects/tiles to the editor.

Cool. Good guide.

I think it would be a good idea to pin this topic so it doesn't get lost. And if you plan to add more info/guides, add it to this one topic. Just rename it to something general, like "lessons from Khottabych."
By the way, Waterfall also has some good lessons; it would be great to collect all of this and pin it so the information doesn't get lost.