Theme recipe fragment

Theme Recipe Fragments is a resource in Fallout Shelter that was added in the 1.8 Update.

Overview
Theme recipe fragments are in fragments of 9 pieces and when put together they can make a theme for any fully merged and upgraded diner and living quarters at a theme workshop.

The game’s four themes are based on the four different factions featured in Fallout 4: the Minutemen, the Railroad, the Brotherhood of Steel and the Institute. Once themes have been applied to rooms, one can change the themes off and on at any time but when they do the vault must reload.

Once you have collected all theme fragments, whenever you get one you just get caps like weapon/armour recipes.

Obtaining Theme Fragments
There are two basic ways of obtaining theme fragments:
 * Spending 27-3 Nuka-Cola Quantums to unlock a theme.
 * Completing quests from the overseer's office