A Nether Portal is constructed primarily by placing Obsidian in a 4x5 Block rectangle; however, the dimensions can be expanded up to a 23x23 size. The Player needs at least 10 Obsidian to build a Nether Portal. The portal is activated by igniting it with Flint and Steel or a Fire Charge.
- The portal block is a block that can be obtained with inventory editors. It has the ID 90.
- It can be placed anywhere and doesn't need Obsidian surrounding it.
- It cannot be pushed by Pistons.
- It cannot resist explosions, Lava or Water.
- The portal block cannot be mined in Survival.
- Most Mobs and Items can pass through the portal and teleport to the Nether, and vice-versa.
- The Player cannot use a Nether Portal in Old Worlds, as there is no compact "Nether" dimension in the older version of Minecraft worlds yet.
- To travel to the Nether, the Player has to build a Nether Portal in an Infinite World.
- However, if the Player uses Inventory Editors to spawn in a Nether Portal Block in an Old World, then he/she may travel to the Nether. However, this Nether is very glitchy and can harm the Player's world file.
- A Nether Portal can be activated by using a Dispenser to activate Flint and Steel or shoot a Fire Charge.
- Before the Nether was added to Minecraft, there was a manufactured structure called the Nether Reactor which generated a "spire" of Netherrack with Nether-related items inside.
- A Nether Portal can be activated in the Nether by a Ghast shooting a Fire Charge.
- The Player cannot use a Nether Portal while riding a Pig or a Horse.
- If the portal is generated in the air, it will be surrounded by Netherrack.
- It will only do this if the Nether Portal generates next to an ocean and if there is no Cave under it to teleport.
- In Update 0.16.0, the Realms loading screen was changed to the same color as the Nether Portal interior.
- Also, in Update 0.16.0, when the Player enters a Nether Portal, the "Generating World" screen no longer appears.