Dense Twilight Forest is a biome added by Twilight Forest.  This biome consists of large canopy trees and oak trees that are denser than the biome's normal counterpart.

Twilight Forest Biomes
Wet Fire Swamp.png Fire Swamp16px Lake16px Swamp
Forested 16px Deep Mushroom ForestDense Twilight Forest.png Dense Twilight Forest16px Dark Forest16px Enchanted Forest16px Mushroom Forest16px Twilight Forest16px Twilight Stream
Non-Forested 16px Clearing16px Highlands
Cold Snowy Forest.png Snowy Forest16px Glacier
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