I'm new to Minecraft modding and my first idea for a mod involves a lot of structures. Something like Roguelike Dungeons. So far I have a proof of concept working where I can I build a single room in creative mode, save it in NBT format using vanilla structure blocks, embed that NBT file in my mod, and summon it at will.
I'm thinking ahead to 1.13 (and 1.14) and I'd like to use some of the new blocks and especially the new water mechanics in my dungeons. Of course FML isn't available for 1.13 yet so I don't really know what the future holds. But I assume it is bad news? I assume that if I spend a lot of time making structures in 1.12.2 that they will not load in 1.13 due to the changed block ids? And my 1.12.2 worlds will surely not load in 1.13 either. My mod is barely started so it's not a problem yet. But since I'm new I thought I'd ask for advice anyway.
(Just for the sake of science I tried to load a 1.13 structure in my 1.12.2 mod, and strangely every block imported as an air block except for the iron bars. I couldn't figure that one out.)