I’ve noticed this before, but never had time to investigate. Anyway when an RTSTRUCT has non-simple (self-intersecting) polygons, it does not render correctly in slice view. Should I file a bug report?
We’ll push a fix soon - @Sunderlandkyl is working on it (see https://github.com/Slicer/Slicer/issues/4959).
As a workaround, go to Segmentations module’s Representations section and click “Create” in “binary labelmap”. This will allow using binary labelmap representation for slice intersection display, which works robustly regardless of the complexity of the input.
Cool. Thanks @Sunderlandkyl !!