Where did the czm_globeDepthTexture go?

[znkim]

I found a solution to the problem in another link.
And I succeeded in implementing SSAO.

Postprocessing with normal and depth information

Thank you Sean. I use the tileLoadProgressEvent in order to attach post processing stage as soon as “some” tiles have been loaded. This is enough to make czm_globeDepthTexture available. However, the uniform becomes unavailable again (and Cesium throws an exception) as soon as the depth buffer is unused/empty (when nothing is in view while looking upward for example). I know this is a rare occurrence when using Cesium “normally” but it can be a problem for, say, a flight simulator