The Yellow Mosaic Tile Wall is a terracotta-colored building block with an ochre yellow frame on two sides and ochre yellow swung ornaments on four sides.
It can be crafted in your Crafting Menu (default key "q") after the according crafting recipe has been unlocked by finding and learning the rather rare Recipe Book.
The recipe can be found in Iron Treasure Chests spawning on blocks of the Lava layer (ever since R22) underground, or in Diamond Treasure Chests spawning on blocks of the Corruption layer. Even more rarely, you can obtain this recipe from Things, Silver Keepas or Golden Keepas as a loot or pet-harvest.
Recipes can also be learned in player-created Adventures.
The block can be rotated by pressing and holding R and moving the mouse while holding the left mouse button.
To craft 8 (blocks of) Yellow Mosaic Tile Walls, you'll need (as of R44 in June 2017):
- 1 Yellow Pigment made of Yellow Flowers from Cragwood trees in a Processor or found in Obsidian Treasure Chests
- 4 (blocks of) Adobe Bricks, made from Mud in a Forge
- 2 Iron Rods made of Iron Bars in a Processor
- 2 (blocks of) Siltstone mined from the Stalactite layer underground with at least an Obsidian Mining Cell or better.