3D Tile disappears

I observe some strange behaviour with a 3DTile disappearing when navigating the map.

Sample see https://bertt.github.io/cesium_issues/geometry_disappears/ - zoom in on the geometry central in the box.


Some remarks:

I suspect it has got something to do with the layout of triangles (triangles crossing?), see the wireframe:


Source of these triangles is some external file so I don’t have influence on the triangulation.

So the question is: why does this 3D Tile disappears sometimes when navigating the map? What does it take to fix this?

nevermind, I’ve fixed it see https://bertt.github.io/cesium_issues/geometry_disappears/index_fixed.html

cause: there was some rounding going on in the boundingvolume region in tileset.json…