Beaches

Will always spawn where land connects with sea.

Mudflats

Spawns near Swamps. Consists of podzol and dirt. Witch huts can spawn here

Rocky Beach

Spawns between sandy beaches and snowy beaches

Sandy Beach

Standard sand beach. Spawns coconut trees

Snowy Beach

Rocky beach but with snow.

Flat

Refers to any land that isn't considered a mountain.

Badlands

Desert

Muddy Bog

The first terraformgenerator biome to use custom biome colours. Has a yellowish sky and fog colour.

Bamboo Forest

Spawns near Jungles. Pandas can spawn here.

Jungle

Dense shrubbery and trees.

Dark Forest

Dark and dense forest. Large roots crawl across the forest floor and large mushrooms spawn here.

Pale Forest

A dark forest variant without mushrooms, with the base Minecraft pale forest biome. Spawns Creaking Hearts.

Forest

Spawns small and large fractal oak trees, and spawns grass paths and shrubbery.

Scarlet Forest

A sparse forest which sports birch trees with red leaves.

Ice Spikes

Icy spikes spawn here, along with Animal Farm village houses.

Plains

Standard grassy plains. Decorated with small trees and flowers.

Meadow

Normal plains, but with no trees, and large clusters of flowers

Eroded Plains

Plains with large stone decorations protruding from the ground.

Elevated Plains

Plains with a higher elevation. Steeper sides have a granite-diorite-andesite pattern to them. Oak variants of taiga trees grow here.

Savanna

Tall grass on most tiles. Acacia trees spawn here, along with very large Baobab trees

Cherry Grove

A biome which registers a custom biome to create pink-ish leaves. I've tried to make the leaves more vibrant, but Minecraft tints leaves gray, which gives the leaves a slightly weird look.

Snowy Taiga

Looks like a regular Taiga, but snowy.

Snowy Wastelands

Spawns frozen trees. Mostly bare snow surfaces.

Taiga

Spawns cone-shaped large Spruce trees, as well as umbrella-like small spruce trees.

Gorge

A large and more extreme version of Eroded Plains. Gorges will carve open ravines with water and rocks at the bottom. Adjacent rivers and oceans can form small waterfalls.

Petrified Cliffs

Protrusions of rock from the ground, along with rock trees.

Arched Cliffs

Spawns large elevated platforms, with concave arcs in the cliffs. Sometimes this results in a semi-floating island.

Mountains

By default, these are a little rare. There may be a few things that will change with mountains in the future, as they are currently quite plain.

Birch Mountains

Spawns large and small Birch fractal trees. Sometimes may snow.

Badlands Mountains

Similar to vanilla's badlands mountains. These will spawn layers of coloured concrete.

Desert Mountains

Desert mountains will spawn yellow concrete powder and concrete by default. Configurable in config.yml

Rocky Mountains

Most common mountain type. Exposes some stone, along with grass and dirt.

Snowy Mountains

Bare, snowy mountains. Likely subject to change as it is way too plain.

Jagged Mountains

Rocky peak mountains. Can spawn snow like snowy mountains

Painted Hills

Spawns in Hot Vegetation climates.

Shattered Savanna

Forested Mountains

Jungle mountains. Rivers can carve into the mountains, creating underground rivers with glowing flora.

Oceans

Anything with ground below the config's sea level is considered a sea.

Frozen Ocean

Oceans that spawn with a sheet of ice over them. Currently quite plain, subject to change.

Cold Ocean

Just an ocean with lesser plant life. Also quite plain, subject to change.

Black Ocean

Stone spikes spawn in these oceans. Meant to be a rare biome.

Lukewarm Ocean

Corals can spawn here

Ocean

Standard-issue ocean with teeming plant life.

Swamp

Dark biome with wide swamp trees. Witch huts can spawn here. Spawns a configurable amount of clay.

Warm Ocean

An ocean that spawns in hot areas like near deserts.

Mushroom Islands

Classified as an ocean because it is used that way in code.

Uncategorised

Extra biomes that don't quite fit anywhere

Badlands River

Used for Terracotta formations next to badland areas.

River

Similar spawning mechanics compared to Oceans. Also spawns a configurable amount of clay.

Frozen River

Similar spawning mechanics compared to Frozen Oceans. Also spawns a configurable amount of clay.

Oasis River

Spawns in desert and badlands rivers.

Caves

TerraformGenerator primarily uses vanilla's cave system to create cave shapes, but it does add more decorations, such as stalactites and stalagmites.