Impossible cube ambiguity present in a Necker cube illustration, in which a cube is drawn with its edges as line segments, and can be interpreted as being in either of two different three-dimensional orientations. An impossible cube is usually rendered as a Necker cube in which the line segments representing the edges have been replaced by what are apparently solid beams. In Escher's print, the top four joints of the cube, and the upper of the two crossings between its beams, match one of the two interpretations of the Necker cube, while the bottom four joints and the bottom crossing match the
Cube (collectible card game variation) constructed to be played like a non-collectible customizable card game or ECG (Expandable Card Game), also known as a Living Card Game (LCG). A cube's construction is done with a focus on what type of metagame is desired. Cube (collectible card game variation) A Cube is a variation of gameplay for collectible card games. It is a player-made set of at least 360 cards created for the purposes of drafting, though as many as 720 can be used. Booster packs are simulated from the contents of the cube and are used to draft cards for play. A cube typically accommodates