The colosseum & volcano large scenery items have some buggy clearances related to the "corners" property.
Firstly, the volcano uses this flag erroneously as it was just cloned from the colosseum so i've just removed it from all of the tiles it had as all of it's sprites take up the entirety of their tiles.
Secondly, the colosseum would allow you erroneously to build inside the areas i've marked in the screenshot below with pink quarter blocks. I've removed these as well.
The colosseum & volcano large scenery items have some buggy clearances related to the "corners" property.
Firstly, the volcano uses this flag erroneously as it was just cloned from the colosseum so i've just removed it from all of the tiles it had as all of it's sprites take up the entirety of their tiles.
Secondly, the colosseum would allow you erroneously to build inside the areas i've marked in the screenshot below with pink quarter blocks. I've removed these as well.