Schematic illustration of our interpretation of the observational properties of SN 2024qiw. The left and right panels correspond to the first and second rebrightenings, respectively, with the system viewed from above each bottom panel. The enhancement of the −4000 km/s component in the Hα profile during the first rebrightening indicates interaction with a major CSM clump on the near side of the SN ejecta, while the enhancement of the +2000 km/s component during the second rebrightening suggests interaction with another major clump on the far side. The dotted lines show the locations of the local photospheres produced by the CSM-clump interaction.