While making a modpack recently, I wanted to add a world to the my modpack SMP for creative building. Every solution I found was old so I decided to make a simple mod to fix my problem. It isn't as robust as I could have hoped for, but I do not know how to make mods or understand java yet, and thus have used MCreator.
Feature Set:
Overworld generation
portal igniter craftable in survival
Balanced for survival gameplay?? Lapis block frame and expensive portal ignitor.
gamemode automatically switched when entering and leaving dimension
Clears inventory upon entering or leaving (I wanted to have two different sets of inventories but with MCreator it is too hard.)
Client and Server need to have this mod (I want it to be Server only in the future if I can manage.)