Smooth Sandstone is a building-block looking very much like Sand, that you can craft in your Crafting Menu (default key "q"), but only after finding the according Recipe Book, which is a rare content of many kinds of Treasure Chests.
To be permanently added to the crafting menu (and to be carried over to all other Creativerse gameworlds like all rare and store-bought Recipes), this recipe has to be learnt at first by right-clicking on it in your inventory/bag or dragging it with the left mouse-button over your player character model on the right side of the inventory.
To craft 8 blocks of Smooth Sandstone you'll need (as of R44 in June 2017):
- 1 (block of) Igneous Rock mined from the Lava layer underground with at least an Iron Mining Cell or a better Power Cell equipped
- 1 Stone Rod made of Stone, Limestone or Bedrock in a Processor
- 1 (block of) Sandstone mined on the surface from Canyons. Pulling this natural block does not require any Power Cells to be equipped
The block can be rotated by pressing and holding R and moving the mouse while holding the left mouse button.