Top: overlay of CO(3-2) contours on the unsharp-masked blue (F450W) HST image. The HST image has been aligned to correspond to the ALMA astrometry. Bottom: unsharp masking of the HST I-image of NGC 1433, covering the nuclear ring and the dust lanes along the primary bar. The FWHP of the primary beam is indicated in yellow (18′′ in diameter), and the FOV of the CO map in Fig. 2 and in the above image is indicated in blue (square of 248 on a side). The characteristic dust lanes on the leading edge of the main bar are outlined in orange.