Hi iMaterialise fans,
Almost-a-Cube is, as it name says, almost a cube. The puzzle mechanism is based on a cubic 5x5x5. However, the dihedral angle between adjacent axes is not the regular 90 degrees, but around 100 degrees. This results in a distorted cubic puzzle with only four functional rotation axes. Because of intersecting planes, one of the axes has only one rotating layers, whereas the other three have two. As a result, the puzzle has no overall symmetry.