((a), (b)) Depth-resolved reciprocal lattice spacing for beam path starting in location 1 in the center of the indented area (a) and corresponding line profiles at three distinct depths marked by numbers (b). ((c), (d)) Depth-resolved reciprocal lattice spacing for beam path starting in location 2 outside of the indented area (c) and corresponding line profiles (d) which practically do not change with depth.