I see a lot people having struggle with that, so here is a quick and easy solution I wanted to share.
There is this tile in Dungeon_A2 - cut it out.
Duplicate it two times and merge the 3 layers.
Add your two terrains as seperate layers.
Today I received three emails about changing my password on netflix a service I recently canceled. It seems someone was trying reset the password as they already new my email. Next I believe they would attempt to hack my email to reset the password. Long story short I changed to a new email...