Bivariate Ripley’s L comparing the bubbles detected in the different wavelengths at window sizes 12–70 px to each other (top left: Hα-S II; top right: Hα-O III; bottom left: S II-O III). Solid black line: L estimated from original pattern. Dashed red line: Pointwise mean of half of the simulated patterns. Gray envelopes: MAD. 10 px corresponds to about 1.67’ or 24 pc at an LMC distance of 50 kpc.