(excuse my sloppy Photoshop, I haven't been able to print it yet)
There are hairline gaps in strategic places to make it a continuous perimeter. Normal slicing settings will close these gaps. You'll have to explain to the slicer that you don't want it to do that. (you'll have to enable at least “advanced” mode in PrusaSlicer to do it). Set the closing radius to zero.
Enable the spiral vase mode and give it enough bottom layers to fill the platform.
The author remixed this model.