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 An impossible cube is usually rendered as a Necker cube in which the line segments representing the edges have been replaced by what are apparently solid beams.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
Gelatinous cube who's not either glued to the floor or fast asleep. In fact, we're pretty sure the "Dungeon Master's Guide" reads: "The first player to ask "Can't I just get out of the way?" automatically defeats the Gelatinous Cube"." Rob Bricken from io9 named the gelatinous cube as the 5th most memorable D&D monster. Chris Sims of the on-line magazine "Comics Alliance" stated of the gelatinous cube that "there can be no question of what is the greatest monster" in "D&D", calling the gelatinous cube "amazing". Gelatinous cube A gelatinous cube is a fictional monster from the "Dungeons & Dragons" fantasy