Continuum images of HD 34700A (left), IRS 48 (middle), and HD 142527 (right). The white and black contours are taken at 3σ, 5σ, and 2ⁿσ, with integer numbers n ≥ 3. The white plus sign marks the centre of the ring in the galario model, the ellipse in the bottom left corner represents the synthesised beam and the arrow in the bottom right corner shows the direction of the gas rotation. We apply an asinh stretch from {0.007, 0.007, 0.000} mJybeam⁻¹ to a factor {0.2, 0.4, 0.7} of the peak intensity, using a stretch parameter of {0.1, 0.01, 0.1} to the colour scale to visually enhance the fainter emission.