Clay tiles are a type of block added in Public Beta 27. They are a chromatic brick made from hardened clay and can be used to create clay tile stairs, slabs and walls. They are designed as a non-faction specific decoration block to add some variety to structures.
Crafting clay tiles is somewhat complex. It can be broken up into 5 steps: blocking, cooking, crafting, colouring, and further crafting. Specific instructions of how to do this are below:
First you need to make clay blocks out of your clay balls in your personal grid or a vanilla crafting table.
Second, you need to bake the clay block into hardened clay in a furnace. No other type of forge works. You can also buy hardened clay from a Morwaith hutmaker or mine the hardened clay boulders in the Emyn Muil or Perdorogwaith.
Then, you craft four hardened clay together to four clay tiling blocks. Again, use your personal grid or a vanilla crafting table. Alternatively, you can craft the tiling with previously stained clay. In this case, the tiles do not need to be dyed again.
Finally, you can craft either coloured stairs, slabs, or walls from the coloured blocks on a vanilla crafting table. You can also use uncoloured blocks. Note, that you can't dye uncoloured stairs or slabs afterwards!
The image to the left shows all possible colours. Each patch is 2x2 blocks. The border is 1 block wide and made of uncoloured tiles. Hover over the tiles to see the colour name.
Clay tiles and their stairs generate naturally in several colours in various structures like Elven smithies, High Elven halls, High Elven towers, Dalish villages, Dorwinion houses and Easterling settlements where they form the roofs of these structures.