Yellow Adobe Stairs are pale yellow building-blocks cut into an L-shape.
Usually placed as stairs they will smooth the player-character's movement up and down gradients so no jumping is needed. They can be placed as projections of walls or for other purposes too when being rotated by pressing and holding R (as the default key) while moving the mouse.
Yellow Adobe Stairs can be crafted in your Crafting Menu (default key "Q"), but only after the crafting recipe has been unlocked.
8 Yellow Adobe Walls each can then be crafted with 2 (blocks of) Adobe Bricks, 4 blocks of any kind of Canyonstone (like Ruddy Canyonstone, Dark Canyonstone or Canyonstone), plus 2 Stone Rods made of Stone, Limestone or Bedrock in a Processor, 1x Melted Wax made of Beeswax in a Forge or found in Treasure Chests and 1 Yellow Pigment made from Yellow Flowers (from Cragwood trees or Wood Treasure Chests) in a Processor.
Additionally to that you will also have to create Yellow Adobe Slabs from blocks of Yellow Adobe Walls by simply putting them into a Processor. No crafting recipe has to be unlocked for that. To craft 4 (blocks of) Yellow Adobe Stairs at once, you'll need
- 2 Yellow Adobe Slabs made of Yellow Adobe Wall in a Processor
- 1 Stone Rod made of Stone, Limestone or Bedrock in a Processor
- 2x Melted Wax made of Beeswax in a Forge or looted from Wood Treasure Chests or Stone Treasure Chests