Surface, this layer starts from 0m to

10m (C418 - Taswell)

Shallow, this layer starts from 10m to

100m (Terraria Overhaul - Underground)

Caverns, this layer starts from 100m to

400m (Azure Mines - Depths of the Mine)

Deep, this layer starts from 400m to

600m (Terraria Overhaul - Underground Alternate)

Lower, this layer starts from 600m to

1000m (Shulkern - Gloom)

Mystery, this layer starts from 1000m to

1500m (Shulkern - Bluestone)

Inbetween, this layer starts from 1500m

to 2000m (C418 - Droopy likes Ricochet)

Underworld, this layer starts from 2000m to 2500m (Shulkern - Underworld)

Mantle/Lava, this layer starts from 2500m to 3000m (Terraria Overhaul - Eerie)

Irradiated/Radioactive, this layer starts from 3000m to 3500m (Shulkern - Hazard)

Wasteland, this layer starts from 3500m to 4000m (Heart plus up! - Psychedelic Depths)

Mirage/Dreamscape, this layer starts from 4000m to 4500m (Azure Mines - Dreamscape)

Gloom/Dread/Nightmarescape, this layer starts from 4500m to 5000m (Azure Mines - Dreamscape slowed + reverb)

Void, this layer starts from 5000m to 5500m (DM DOKURO - Void)

Grayscale, this layer starts from 5500m to 6000m (Apochrypos - Heartsick)

Whitespace, this layer starts from 6000m to 6500m (Terraria Overhaul - Underground Crimson 2x speed)

Frigid, this layer starts from 6500m to 7000m (Terraria Overhaul - Underground Snow)

Marine/Ocean, this layer starts from 7000m to 7500m (Heart plus up! - hesitation)

Cosmic, this layer starts from 7500m to 8000m (DM DOKURO - Treasures Within the Abomination)

Infernia/Core, this layer starts from 8000m to 8500m (Shulkern - Calamity)

Serenity/The Middle, this layer starts from 8500m to 8600m (C418 - Axolotl)

Plasma Field, this layer starts from 8600m to 9000m (Boom Kitty - Detour)

Quantum, this layer starts from 9000m  to 9155m (Shulkern - Blossom)

Stability/Stability Crust, this layer starts from 9155m to 9167m (White Noise)

Planck, this layer starts from 9167m to 9290m (Shulkern - Paroxysm)

Conversion, this layer starts from 9290m to 9360m (Shulkern - Paroxysm pitch shifted)

Disarray/Disorder, this layer starts from 9360m to 9600m (Ambience 1)