Vr-TheWorld Terrain Provider stair steps

We are trying to update our Cesium demos in house to the latest cesium version (1.21) and when we use the VR-TheWorld Terrain provider the elevation that is drawn has numerous discontinuities so it appears that mountains have stair steps. I have attached a picture of what I am talking about. This does not appear in our old demos which are accessing the same server and layers but were developed against a very old version of cesium. The strange part is that the terrain appears normal between the large discontinuities, and the discontinuities do not appear to be confined to tile boundaries.

Can you give me any pointers as to what is happening here? and maybe what I can do to fix it?


Hello Kevin,

It looks like this was a bug introduced in the 1.18 release. I’ve filed an issue on our GitHub: https://github.com/AnalyticalGraphicsInc/cesium/issues/3964

I’ve marked the issue ‘Next Release’ so it should get fixed soon. It probably won’t make it into the 1.22 release since that comes out a week from today, but I think it will definitely be fixed for the 1.23 release in July.

Thanks for reporting this! I’m not sure how this bug slipped through unnoticed for so long.



Hi Kevin,

The issue was fixed and will be in the 1.22 release next week.