That’s weird, it upgrading only to stormglass… I don’t understand what makes it different… I can say that there seems to be a lot more going on under the hood with the new tile sets. Maybe they are using different phasing of these tiles into the game world as opposed to the old sets. That’s why you can’t upgrade, it can’t read it properly using the old code.
Sounds like they changed the format somehow. I’m not a tech person.
On the bright side… if your structure won’t crash when you remove a piece, at least you get some resources back. I don’t remember if you get refunded when you simply upgrade the tile directly. I usually upgrade using E > destroy tile.
You can’t downgrade from T3 to T1, and sometimes I change my mind about how I want stuff to look. I don’t remember if you can go from one T3 to a different T3. I don’t think you can do that either. So I’m used to destroying pieces and upgrading by putting the same piece from a different set in its place. We have so many T3 DLCs.
But sandstone was always a cheap way to “see” how the structure would look before you committed to a higher grade of materials. That’s always been the advantage for me. It’s a little more tedious to remove them by hand, but at least you don’t have to wait for the debris to clear before you snap something else in.