The layer system of RPG playground is very powerful. With this, we’re able to draw passable tiles above impassable tiles. That way we’re able to make places impassable, which usually would be passable.
Sometimes, even for a creator it can be very difficult to guess, if the passability of a place is correct or if there are some issues left on a level.
To solve this, you could implement a view with just two colors:
E. g. passable places could be displayed grey or white and unpassable places could be displayed black. That way creators could see passability issues at once.