Please read the pinned post on creating biomes and dimensions. Please put items for the new Mountains and Nether Updates in their proper categories. Remember portals are structures, that includes Nether portals.

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614votes
Ready to talk biomes and dimensions? Here's how to do it! (Start Here) Pinned
0votes
(Biome) Nether Roof Biome
2votes
Ghast Peppers - A new Nether crop
2votes
Dimension for the Future: Ascendance
5votes
Brimstone Caves(Nether Update)
11votes
Thin Trees
2votes
New Shade biome
2votes
(Biome) ender of eye
6votes
Fairy Forest Biome
2votes
New Biome: Mushroom Cave
2votes
Wartshroom Forest
6votes
Electric biome/Redstone biome
5votes
End Forest and End Core
3votes
Super Biomes
3votes
Magma Mushroom Plains Biome (Nether)
3votes
Evil zombie biome
6votes
(Nether) Glowing Plains
3votes
Magnolia biome
3votes
Nuclear Geyser Biome
10votes
The Beginning (New dimension)
4votes
Crying Mountains Biome
5votes
Underwater mountain biome
6votes
Nether biome Ghast Forest
7votes
Lava Beach Nether Biome
8votes
Ender jungle
5votes
Flameing Spikes Biome (Nether Update)
5votes
Dry Tundra Biome
9votes
New Demension: Wyvernex
5votes
Shattered Savanna Biome Parity
8votes
Rivers In The Nether (Prevents Shriveling. Nether Update)