stick a picture to Cesium-earth with Polar Projection

I want to stick a picture to Cesium-earth with Polar Projection ,but I found Cesium can not test what the projection is.

I want to known how stick a picture to Cesium-earth with Polar Projection?

Hello,

Sorry, but Cesium does not currently have a polar projection implemented. It’s not in our plan to add this any time soon, but if you are interested in implementing it we would gladly take the contribution! Check out our BuildGuide for how to get and build the code base.

Best,

Hannah

All right,Thanks