12x12 Terrain Trays are part of Caverns Deep! Terrain Trays are two-sided colored printed sheets to represent two different terrain foundations to support terrain pieces. They are made of a metal sheet with color-printed neoprene layers one either side. This item was initially available as an add-on for the Build Your own Cavern pledge level or included in one of the other pledge levels during the Caverns Deep! Kickstarter. The 12x12 terrain trays come in six different terrain themes -- Quicksand/Cave Stone, Necrotic Sludge/Bottomless Pit, Ice Sheet/Ice & Rock, Crystalline Floor/Festering Floor, Cave Water/Running Water, and Light Woodland/Forest Clearing. Each 12x12 Terrain Tray set comes with (1) terrain tray, except for the Light Woodland/Forest Clearing which comes with two trays. The Variety Pack contains (5) terrain trays: (10 each of Quicksand/Cave Stone, Necrotic Sludge/Bottomless Pit, Ice Sheet/Ice & Rock, Crystalline Floor/Festering Floor, and Cave Water/Running Water.