Current questions and answers regarding the map editor.

In the map properties tree, open the hidden objects (Show Hidden), add a new element to the tiles, and find the snow. It is located here: /MapObjects/_(AdvMapTile)/Snow/. You need to copy it into one of the existing folders (Grass, Sand...). For this to work, you will need to restart the editor. I tested it in the original game. Thanks to this, you can create anything you want, even a river of milk with shores of jelly.