This mod adds the Nether Dimension, accessible from Nauvis via Nether Portals.
Like Minecraft, the Nether is smaller than the overworld, so traveling just a short distance equates to a much longer distance on Nauvis.

Nether Portals are made from obsidian, an extremely hard material forged of reinforced concrete, stone, and steam. It can also be made by combining lava and water.

The nether scale can be configured from game startup settings. Default scale is 4:1 Nauvis:Nether ratio.
Standing on a Nether Portal will teleport the player from Nauvis to the Nether, or vice versa.
The Nether is hot, like hellishly hot. There is no water.
As in minecraft, the nether dimension in this mod is not meant to be easily accessible. It may take significant time and resources to even build just the first portal. However, with the right infrastructure and supply chain management, portals can be automated to acquire a stockpile or build out continuous production. And thanks to the unique spacial composition of the nether, traveling to distant outposts and charting unexplored regions is quick, easy, and fun once the portals have been built.

This mod is fully compatible with the Alien Biomes mod, and when installed the Nether dimension will be fully volcanic and hot.

Note: this mod is a work in progress, so recipes and other aspects are subject to change. I am open to any feedback or ideas, just leave a post on the discussion board or contact me on discord :)

Other mods by asher_sky:

• «trainsaver» Creates a dynamic screensaver which follows trains from station to station.
• «Cooked fish» Allows raw fish to be cooked in a furnace.
• «Chorus fruit» Adds chorus fruit you can eat to teleport randomly, just like minecraft.
• «Apples» Adds apples you can eat to regenerate health, just like minecraft.
• «Ender Pearl» Adds an ender pearl you can throw to teleport, just like minecraft.
• «Cutscene Creator» Adds a command to create custom cutscenes.