• MAPGrid now has some real Documentation! This documentation covers most topics, like how to use the Editor, how to create a custom Tileset, how the Rule System works, etc. The Docs do not currently cover Custom Brushes, Creating a Tileset Palette, or using the Tool from a script. 
• Tiles can now use multiple meshes at once! When using a Set Mesh action, you have the option to use a single mesh, all of a list of meshes, or randomly choose one from the list. (In the future, I intend to have the option of setting a percent chance for each mesh, giving specific meshes higher probability, but that is not yet possible.
• The Tileset Migration Tool is now available. This tool helps convert your custom Tilesets to be compatible with the newest version of MAPGrid. Hopefully this will mitigate the chances of introducing breaking changes in the future.

The documentation should be complete anywhere from a few days to a couple weeks. Please let me know if it's at all confusing to read.