The Gas Rainforest is inaccessible due to poisonous gas that deals damage over time to the player. To explore this biome, you will need to craft a Gas Mask by combining the following items at an Alchemy Station: • 4 x Peagawk Plumes • 1 x Cloth • 1 x Pig Skin I recommend only using the Gas Mask in the Gas Rainforest biome, as it will drain your character's Sanity by 10 points every minute!