Looping the stack

Once you have your stack setup, you might want to have it loop (in some cases), and that is extremely simple!

aether:the_aether*-1!256?
minecraft:overworld*-65!320?
minecraft:the_end*-1!256?
aether:the_aether*-1!256$

In this case, once you dig down you’ll arrive in the end. On the end, you can jump off arriving at the aether, and jump off arriving at the overworld looping back down to the end infinitely.

Seperate Stacks

Our goal:

• The Aether above the overworld
• The end above the twilight forest

All you do is add a placeholder in-between, and they're officially separated

aether:the_aether*-1!256?
minecraft:overworld*-65!320?
placeholder*!?
minecraft:the_end*-1!256?
twilightforest:twilight_forest*-33!256$

This allows for traveling between the aether and overworld, but not the overworld and end.