Isodensity contour maps constructed to search for stellar clustering around the compact SMC H ii region N33. In the top-left panel, the stellar map for the close-up field of view centered on N33 (position 0, 0). The stellar density maps refer to the same close-up field of N33. They are shown as they are constructed for all observed stars (green map, top-right panel), for blue (main sequence) stars (blue map, bottom-left panel), and red evolved stars (red contour map, bottom-right panel). Isopleths are plotted starting at the average background stellar density and in steps of σ above this level. No stellar concentration with density  ≥3σ above the background is identified in the maps. Only the central part of the small stellar clump encircling N33 in the green and blue maps reaches the 3σ density level.