Planks

Planks are the higher tier of Wood; they are sold at the Wood Dropoff for 10x the amount as Logs would. (This is based on data found in VPS experiments). Planks can be created by running logs through a sawmill. Planks remove the outer "Bark" in the sawmill process. The wood will also be reshaped to the size displayed on the side of the sawmill in planks. This can be edited to any size the player desires, but it does have a limit to the size of the hole it comes out, which is the same size as the maximum plank width, and the size of the Sawmill's hole. Planks are also the key ingredient to blueprints, as blueprints don't allow logs for structures.

Planks can be run through a Sawmill as many times as the player wants, and will be re-shaped without loss to conform to the Sawmill's 'Plank Cross Section' setting. However, as with logs, the sawmill can only process planks up to ten units in length, so if re-shaping a plank results in a plank longer than this, the conversion is irreversible without first chopping the long plank into more manageable pieces.

Lava Wood, Zombie Wood, Gold Wood, and Cavecrawler Wood have planks that are more colorful than planks from other trees. This is probably used to point out their significance. Spook Wood planks are unique because it is the only wood known to have the 'granite' material inside, often compared to a counter top. Glow Wood, and Cavecrawler Wood are also unique because they are the only planks known to give off a glow when on graphic setting 8 for a newer graphics card.

There is a possible glitch where you could make a wide plank bigger than an average one, but it is not as big due to a bug fix with planks. This glitch is useful for a trip to the Lava Cavern if you ever need to get to the Green Box.