Issue : Evolution from 2x2 to 1x1

Dear people,

i have an issue with the evolution process.

I designed some 1x1 small tents for my camping which can evolve into 1x1 large tents.
There is no issue with that, it is working fine.

Then i decided to add some 2x1 and 2x2 small tents to add variety.

But when a 2x1 or 2x2 small tents evolve into 1x1 large tent, only one 1x1 tile become a large tent and the other tiles become water with nothing.
The issue is visible on the pictures joined.

If anyone has some advices to help me on that, it would be cool.

Regards,
nppk28

Hello all,

thanks to brukoslav on another forum, the solution was to add the "root" attribute.
When deleted, the other tile will transform into the building defined in the root attribute instead of become empty water.

Regards,
nppk28