English: A two-dimensional "crystal" in direct space, and its reciprocal lattice^[1]. Note that the reciprocal-lattice or g-vectors (e.g. a* and b*) are parallel to the "d-spacing gaps", but not to the direct-lattice vectors (e.g. a and b). Also note the shape transform of the crystal convolving each of the "diffraction spots" in the panel at right. The pattern for this lattice in integer-pixel terms was simply a ∝ {2, -1, 0} & b ∝ {1, 4, 0}.