Cartographic polygon artifacts with self-intersection polygons

[kring]

This might be firmly in the "well, don't do that" category. But cartographic polygons with polygons with self intersections do work remarkably well:

Except when you zoom in close, some tiles - perhaps upsampled ones - seem to mysteriously be missing completely. This is even though "Exclude Tiles" is off on the raster overlay,

This is on Google Photorealistic 3D Tiles, in case it matters.