4D tesseract projected to 2D — rotate in all 6 planes of 4-space
A tesseract (4D hypercube) has 16 vertices, 32 edges, 24 square faces, and 8 cubic cells. Rotation in 4D occurs in one of 6 coordinate planes (xy, xz, xw, yz, yw, zw). The 4D-to-3D projection uses perspective division by the W coordinate, analogous to how 3D perspective works.