An optically variable security arrangement for securing valuable articles, having - a first sub-element having a two-dimensional relief grid that is composed of a plurality of grid elements and that has, in at least one spatial direction R 1, a first line screen p below 500 μm, and in which the grid elements are each formed from at least two relief elements that are directionally reflective in different directions, and - a second sub-element having at least one dot and/or line grid that, in a spatial direction R 2, has a second line screen q, - the first and second sub-element, in a verification position, being stacked vertically in such a way that said spatial direction R 1 of the first sub-element is parallel to said spatial direction R 2 of the second sub-element and the vertical spacing between the relief grid and the dot and/or line grid is less than half of the line screen p, - the second line screen q differing only slightly from the first line screen p, especially by less than one-fifth, and/or the first line screen p and/or the second line screen q being location-dependently modulated such that, in said verification position, a movement effect is created by the interplay of the relief grid and the dot and/or line grid when the security arrangement is tilted, - the grid elements of the first sub-element each producing substantially the reflection behavior of a given concave and/or convex curvature that is defined at each position by a normalized local normal vector, and - the grid elements of the first sub-element including, as directionally reflective relief elements, a plurality of micromirrors (36, 36-B) whose inclination against the x-y plane of the first sub-element is determined by indicating its normalized normal vector, and the normal vector of a micromirror (36, 36-B) at a position (x 0,y 0) being determined by the local normal vector of the given curvature at said position, modified, however, by a random or pseudorandom angle modulation of the normal vector in at least one spatial direction. - a first sub-element having a two-dimensional relief grid that is composed of a plurality of grid elements and that has, in at least one spatial direction R 1, a first line screen p below 500 μm, and in which the grid elements are each formed from at least two relief elements that are directionally reflective in different directions, and - a second sub-element having at least one dot and/or line grid that, in a spatial direction R 2, has a second line screen q, - the first and second sub-element, in a verification position, being stacked vertically in such a way that said spatial direction R 1 of the first sub-element is parallel to said spatial direction R 2 of the second sub-element and the vertical spacing between the relief grid and the dot and/or line grid is less than half of the line screen p, - the second line screen q differing only slightly from the first line screen p, especially by less than one-fifth, and/or the first line screen p and/or the second line screen q being location-dependently modulated such that, in said verification position, a movement effect is created by the interplay of the relief grid and the dot and/or line grid when the security arrangement is tilted, - the grid elements of the first sub-element each producing substantially the reflection behavior of a given concave and/or convex curvature that is defined at each position by a normalized local normal vector, and - the grid elements of the first sub-element including, as directionally reflective relief elements, a plurality of micromirrors (36, 36-B) whose inclination against the x-y plane of the first sub-element is determined by indicating its normalized normal vector, and the normal vector of a micromirror (36, 36-B) at a position (x 0,y 0) being determined by the local normal vector of the given curvature at said position, modified, however, by a random or pseudorandom angle modulation of the normal vector in at least one spatial direction.